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My nook tablet was opening apps like Facebook and google search and typing unusual letters in the search and status boxes. Anyone seen anything like this? It honestly seemed like the device was being controlled remotely. I wasn't even touching the device and it was trying to type letters. My device has been rooted for about two weeks. I've not seen anything like this until tonight.
What was your battery charge? There are reports of the touchscreen acting weird when the battery is low.
yea, sounds more like a glitch in the touch screen. this happened on my phone. I would warranty it. Make sure you unroot first
It sounds like a defective unit... I have a Droid X that does the same thing; started happening about a month or two out of warranty. I've factory reset / SBF'd it a million times and it still happens, rooted or not.
For me, it seems to happen more frequently when the screen is dirty (but also happens when perfectly clean), and especially bad if I am wearing clothing that generates static electricity (fleece and other synthetics). Makes me wonder if the screen isn't grounded properly.. the phone has a lot more flex in the chasis than it should and sometimes flexing it in just the right way will make the problem stop.
Thanks
Thanks much for the replies. The battery was very low and I was sitting in a chair that could generate static electricity. Also noticed little bits of dog hair caught between the case and the screen. Not sure I'm going to return the unit just yet. It could have been a fluke. The only time I've seen a machine act like that is when someone controls a server at work remotely. It was really strange and seemed like a program was attempting to type on its own.
One other caveat is that I had installed Aurora on the tablet earlier in the night. It's a browser by Mozilla in development. It was running really sweet so I don't think that had anything to do with it. I did notice that the tablet was locking up on a couple pages and really sluggish for a bit while using the default browser. It then responded fine until the ghost took over.
One other question if anyone is still listening: if this happened to you did the keyboard come up? It didn't appear when the letters were being typed in my case.
I was thinking a cover and possibly a shield may be in order. I've got a year, so it if happens again even one time I'm going to return the unit- after unrooting of course.
My Nook Color will do this as well when it has been zapped by static electricity and when there are a bunch of finger prints all over the screen (usually when the finger oil gets built up around the edges of the screen it starts).
A good wipe down with a microfiber cloth (with the screen off) fixes it for me. Granted this is Nook Color and not my Nook Touch we're talking about, but I figure the behavior could be similar.
Good luck!
Merrell
Weird, I could swear there was a thread about this, but now I can't find it for the life of me.
Anyway, it's a known issue- no need to panic and return the NT.
When the battery gets critically low, sometimes the NT will seem to have a mind of it's own and everything you describe starts happening. Apps open themselves, random text types itself, touchscreen completely unresponsive, etc.
I've seen exactly the same thing, and also at first wondered if it was a remote hack. Then I noticed the pattern that it's only during extreme power lows.
Just recharge to at least a minimal level and there's no problem.
zaptoons said:
Weird, I could swear there was a thread about this, but now I can't find it for the life of me.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1431091
Ah. I knew I posted there, but thread is strangely missing from my 'find all posts..' results.
macrossmerrell said:
My Nook Color will do this as well when it has been zapped by static electricity and when there are a bunch of finger prints all over the screen (usually when the finger oil gets built up around the edges of the screen it starts).
A good wipe down with a microfiber cloth (with the screen off) fixes it for me. Granted this is Nook Color and not my Nook Touch we're talking about, but I figure the behavior could be similar.
Good luck!
Merrell
Click to expand...
Click to collapse
Same thing happens to me but I only switch the screen off and on and then it goes away.
As has been mentioned, charge it, clean the screen, wash your hands. This should take care of the "autogibberish". As far as opening software... do you mean that it is opening foreground applications? Or that software will just load in the background? If the latter, this is NORMAL behavior of Android -- it will load software into memory so that it is instantly available when you try to run the software. If the former, probably related to the dirty screen.
I do NOT believe that this is a hardware defect. It rather is a side-effect of a LARGE touch surface. The bigger the touch surface, the more likely it is to be subject to random static charges.
Whoops didn't realize how this thread was!
Hi, i have had my tablet for about 1 week, straight after starting it up i had a fw update which is 17.1.1.A.0.402 which i am assuming is the latest?
anyway i have read a lot about the new fw was supposed to fix the touch issues?
I also have the z1 which i still have and is perfect. ive recently updated to 4.4.2 on that and all my issues are fine on there.
my z2 is acting very strange, if i leave it alone for a while sometimes i will go on it and everything on the screen will be frozen, i can't tap anything, i have to press the power button and then swipe to open it again, it is then fine after that.
also i have noticed, and i think its happening a lot when my tablet is a little angled using the case, the screen will be a bit jittery, where as my z1 is really smooth, and i also sometimes have to really tap icons a few times before they register.
i play clash of clans a lot and its been a bit difficult to play as troops aren't selecting as i am tapping on them.
has anyone got any advice?
I have done a factory reset to see if that would fix any issues from the fw update but its still exactly the same.
Thanks
James
anyone?
james_lpool said:
anyone?
Click to expand...
Click to collapse
I installed the new firmware yesterday. While I notice an improvement with the touch problem it's still present. Just install an multitouch app (like this one: https://play.google.com/store/apps/details?id=com.easylabs.multitouch), let your finger trail on the screen and it's definitely obvious (the number on the top right should be the number of fingers touching the screen and it's often not). I tried the same thing on my old Iconia A500 and that's the one thing where it's WAY better than the Z2.
I don't experience anything as strange as you do though, it's mostly usable and I hardly notice it with the new firmware.
I did experience something very strange just BEFORE updating with one specific charger and one specific USB cable , the tablet wouldn't register any touch at all while it's was plugged in. As soon as I unplugged it it would work. The cable was fine with another charger and vice versa;
Weirdest of it all:
This happened while I was testing the output current for each combination of cable/charger and this particular couple was the one giving the "best" results; consistently between 1.1A and 1.2A
I can't reproduce this behaviour with the new firmware. All in all, it's usable for me. Biggest bug would be it not charging while playing power consuming games.
I have found mine goes more weird when it goes to sleep and i then wake it up, the screens sensitivity seems to be terrible, i have topress the off button and then start it again then its fine.
it will then mostly stay fine until the screen times out again then the same thing will happen when i wake it.
James: Same with my 521...
Touchscreen response was REAL BAD after updating to .402, then it went better and better day by day; strange phenomenon.
I also occasionally experience some touchscreen "numbness" after waking up the table with a double-tap, sometimes touch sensitivity suddenly becomes quite low just without any reason; touchscreen has problems detecting touches near the screen corners or doesn't react to touches at all. Solution: Switch to standby, and back on.
At the same time, the Android symbols (Back, Home, last apps) again become difficult to hit.
You can test this by slowly swiping your finger up from the lower bezel towards one of the symbols: If the touchscreen is ok, symbols get highlighted right after your finger reaches the lower edge of the symbol. If the touchscreen malfunctions, you need to move your finger up to the center of the symbols to get them highlighted.
So it smells like a software issue.
Touchscreen problems usually occur two to three times a day of normal use; so I regard it as acceptable - but the problem still isn't fully solved.
I would say it's a hardware issue which Sony attempts to counterbalance with software patches.
Just like on the Nexus7 (2013). There sfhub released a touchscreen fix which made the problem bearable for most users (with some experimenting with different versions of the fix, because each device is different).
I wrote a PM to sfhub asking him whether he could disclose how his fix works so that Z2 Tablet users perhaps could apply a similar, variable, tailor-made fix to their individual device.
No response, unfortunately.
Perhaps some of you could send the same request to him, and perhaps then he reacts?
every now and then, after double tap to wake, the tablet is extremely unresponsive.
I also just sleep/wake up again via power button and it's fine after that.
So my but feeling it's a software issue, not hardware issue.
- Frank
I never had touch problems but after updating to the latest firmware, the tablet is unusable from time to time
what's annoying me is that Sony wont seem to admit that there is an issue, i was talking on their live chat to support and they said that's the first time anyone's mentioned that and isn't on any list of any known issues
Which doesn't fill me with confidence on how quick this may get fixed.
The speed in which is gets fixed may determine if i just send the tablet back to Amazon for a full refund, unfortunately i have bought the Sony case and magnetic charger now as well
I'm just really puzzled what to do, what can i do apart from sent it back if Sony wont even acknowledge they are aware of the problem and will release a fix soon
The only thing is because i have now bought the charger and case, i kinda want to keep it.
It was a direct replacement for my Z1 which i still have, and that is also updated to 4.4.2 now, but that shows no touch issues at all.
What's very interesting and revealing:
When Sony was addressed a few days ago regarding battery problems on Tablet Z and a few phones after the Kitkat update, they immediately reacted!
They readily explained that it is a problem with the Google Play Services running amok and that a fix will come.
But it seems that just because this here is a Sony problem (and not one for which another company can be blamed like in the above one), Sony simply doesn't react at all and obviously orders the service employees to lie and say that they haven't heard at all of a touch problem.
Boooo, Sony, shame on you!
james_lpool said:
what's annoying me is that Sony wont seem to admit that there is an issue, i was talking on their live chat to support and they said that's the first time anyone's mentioned that and isn't on any list of any known issues
Click to expand...
Click to collapse
HAHA ! Exactly the same in Germany. Even after talking about that issue with the SAME person three days in a row, I still was told the problem was totally unknown.
Later, I had a more private talk with one of the support guys. He revealed to me there was an order from Sony to tell callers exactly that.
Ah, as I thought.
This is abysmal behavior by Sony, period.
Also on the Sony support forum, none of the official support staff has replied to any of the topics about touch screen issues. It seems they are just completely burying their heads in the sand...
FW .402 didnt fix the touch screen issue. It is noticeably better than any FW from before.
Gosh, the touchscreen keep going back to home when i'm in a middle of fb conversatuion.
I was testing with chromecast +youtube: those swibe action to enlarge or fade out afe 99% imprecise...
Really wondering if I can return the item to amazon to fix this problem...
Diomorgan said:
Gosh, the touchscreen keep going back to home when i'm in a middle of fb conversatuion.
I was testing with chromecast +youtube: those swibe action to enlarge or fade out afe 99% imprecise...
Really wondering if I can return the item to amazon to fix this problem...
Click to expand...
Click to collapse
Are you sure you're not just accidentally touching the home button while typing? That happens to me from time to time, which is a downside of having the navigation buttons centered compared to having them in the corner like on pre-4.4 Android tablets. I actually think Google should add a setting to choose if the navigation buttons on tablets are in the left corner, centered, or in the right corner. Having them centered also makes it awkward to reach these buttons when holding the tablet with two hands.
Hi,
As mentioned above, there is a problem with my A5. When my tempered glass screen protector is fixed and when my phone is charging, my touch screen seemed to go haywire. I am holding my finger in one place but the phone detected that my finger is shaking, wildly. Besides shaking, my phone will stop sensing my finger even though it is held there.
I doubt it is the problem with my hardware because I have already changed the touch screen, charging port and the motherboard by sending it to the Samsung Service Centre. I believe the problem is due to the tempered glass (my previous tempered glass) because it was put onto another A5 and the same problem occured. Now, I have purchased another tempered glass from REMAX (picture below), and it seemed to cause the same problem again.
So now my questions are
1. Can I seek for another alternative such as Spigen's tempered glass screen protector or should I just use the normal screen protector?
2. Am I the only one facing this problem?
3. Is the problem really due to the tempered glass?
Oh by the way, my phone is running on official rom version 4.4.4.
http://76.my/Malaysia/[email protected]
JssCheonGz said:
Hi,
As mentioned above, there is a problem with my A5. When my tempered glass screen protector is fixed and when my phone is charging, my touch screen seemed to go haywire. I am holding my finger in one place but the phone detected that my finger is shaking, wildly. Besides shaking, my phone will stop sensing my finger even though it is held there.
I doubt it is the problem with my hardware because I have already changed the touch screen, charging port and the motherboard by sending it to the Samsung Service Centre. I believe the problem is due to the tempered glass (my previous tempered glass) because it was put onto another A5 and the same problem occured. Now, I have purchased another tempered glass from REMAX (picture below), and it seemed to cause the same problem again.
So now my questions are
1. Can I seek for another alternative such as Spigen's tempered glass screen protector or should I just use the normal screen protector?
2. Am I the only one facing this problem?
3. Is the problem really due to the tempered glass?
Oh by the way, my phone is running on official rom version 4.4.4.
http://76.my/Malaysia/[email protected]
Click to expand...
Click to collapse
Without getting into too much tech details i have a list of possible cause's
1. with having a additional screen cover in place and power connected your body+screenprotector create a capacitor, this is exactly how the screen registers touch , so without the screen protector in place this wont happen. I've seen this on a few Screen protectors that use certain types of conductive glue/bonding agent.
2. faulty charger or fake chargers often cause this behavior, try another charger or use USB on a laptop not plugged into mains power, if the problem is gone then plug in laptop's main power, if problem still gone then your issue is charger, if problem starts when pluging in the laptop's power then it's either ground loop or your screen protector acting as above.
3. faulty assembly when fitting screen, they didnty apply the copper back shield or the protective cloth that act's as a shield around the ribbon cables
before anyone shouts that samsung fixed it, I know and i can quote many a occasion a cell phone was not fixed right first time by the OEM
if you activate developers options and switch on show touches then repeat the test , does the display always show certain areas that register touch , if so it can also show where the bonding agent has a airgap, this adds to the capacitor effect.
finally try wearing shoes when touching the screen, if wearing shoes stops the problem get your house wiring checked.
darkspr1te
gua rasa pasal charger lu tu bro. try tukar charger atau cable lain.
saxmydix said:
gua rasa pasal charger lu tu bro. try tukar charger atau cable lain.
Click to expand...
Click to collapse
thanks saxmydix, i used multiple chargers and it is still the same, i tried charging in another house in another area, still the same problem occured, so i doubt it is the problem with my charger.
thank you for your time and i appreaciate it a lot
darkspr1te said:
Without getting into too much tech details i have a list of possible cause's
1. with having a additional screen cover in place and power connected your body+screenprotector create a capacitor, this is exactly how the screen registers touch , so without the screen protector in place this wont happen. I've seen this on a few Screen protectors that use certain types of conductive glue/bonding agent.
2. faulty charger or fake chargers often cause this behavior, try another charger or use USB on a laptop not plugged into mains power, if the problem is gone then plug in laptop's main power, if problem still gone then your issue is charger, if problem starts when pluging in the laptop's power then it's either ground loop or your screen protector acting as above.
3. faulty assembly when fitting screen, they didnty apply the copper back shield or the protective cloth that act's as a shield around the ribbon cables
before anyone shouts that samsung fixed it, I know and i can quote many a occasion a cell phone was not fixed right first time by the OEM
if you activate developers options and switch on show touches then repeat the test , does the display always show certain areas that register touch , if so it can also show where the bonding agent has a airgap, this adds to the capacitor effect.
finally try wearing shoes when touching the screen, if wearing shoes stops the problem get your house wiring checked.
darkspr1te
Click to expand...
Click to collapse
hi darkspr1te,
thanks for ur response.
1. so it is entirely dependent on how the screen priotector/tempered glass is sticked to the screen?
2. sorry for not including the details on my charger in my post. i am currently using an official charger that i got when i purchased my previous samsung phone(S2 gt-i9100g). i tried using the A5 charger and the problem persists. will using a powerbank recreate the scenario of the unplugged laptop charging? if it is the same, the problem is still there even when my powerbank is unplugged. i do not have a laptop at home and it wouldnt be possible for me to get my hands on a laptop that i can use these few days. i tried charging my phone in another house (in another region which is like 20 kilometers away) and it is still the same. and my brother's samsung galaxy alpha do not have this problem while charging.
3. so u are saying that the problem might be due to oem? once again i apologize for not including this in the post. while i am at the samsung shop, the person in charge tried putting the tempered glass (which was fixed to my phone) onto another A5 which was there due to a boot loop problem, and it started to have the same problem. is it possible that all Samsung A5's assembly do not have the copper back shield or the protective cloth?
apparently nobody in the samsung shop knows how to deal with my problem because they have never seen it before. it took me quite some time to explain to each person who attempted to serve me and i only managed to show the problem to one of the personnel (which was the one who helped me fix my phone). i went back to the samsung shop 3 times in 2 days. in the 1st time, he changed the touch screen, in the second time, he changed the charging port and in the third time, he changed the motherboard.
as for the test, i turned on the pointer location and i keyed in *#7353#, and i selected TSP grid mode. that is how i checked the problem. and while i was there, the shaking only occurs at where my fingers are. i tried enabling the show touches option and the display do not register touches until i touched them.
i doubt it the the problem with my house wiring since it is the same with my other house but thanks for the suggestion. i will definitely try wearing shoes when i am at a different house. maybe both my house got wiring problem.
i learnt a lot from your post. thanks for your time and i hope to hear from u soon
JssCheonGz said:
hi darkspr1te,
thanks for ur response.
1. so it is entirely dependent on how the screen priotector/tempered glass is sticked to the screen?
Click to expand...
Click to collapse
It wont be 100% of the cause but will affect performance of the screen.
2. sorry for not including the details on my charger in my post. i am currently using an official charger that i got when i purchased my previous samsung phone(S2 gt-i9100g). i tried using the A5 charger and the problem persists. will using a powerbank recreate the scenario of the unplugged laptop charging? if it is the same, the problem is still there even when my powerbank is unplugged. i do not have a laptop at home and it wouldnt be possible for me to get my hands on a laptop that i can use these few days. i tried charging my phone in another house (in another region which is like 20 kilometers away) and it is still the same. and my brother's samsung galaxy alpha do not have this problem while charging.
Click to expand...
Click to collapse
Yes, using a non-mains connected charger will be sufficient for the test, like your power bank for example
3. so u are saying that the problem might be due to oem? once again i apologize for not including this in the post. while i am at the samsung shop, the person in charge tried putting the tempered glass (which was fixed to my phone) onto another A5 which was there due to a boot loop problem, and it started to have the same problem. is it possible that all Samsung A5's assembly do not have the copper back shield or the protective cloth?
apparently nobody in the samsung shop knows how to deal with my problem because they have never seen it before. it took me quite some time to explain to each person who attempted to serve me and i only managed to show the problem to one of the personnel (which was the one who helped me fix my phone). i went back to the samsung shop 3 times in 2 days. in the 1st time, he changed the touch screen, in the second time, he changed the charging port and in the third time, he changed the motherboard.
as for the test, i turned on the pointer location and i keyed in *#7353#, and i selected TSP grid mode. that is how i checked the problem. and while i was there, the shaking only occurs at where my fingers are. i tried enabling the show touches option and the display do not register touches until i touched them.
Click to expand...
Click to collapse
Yes,
Galaxy Alpha Images
Note on images 4 and 5 you will see the copper shield, this model does not have the conductive cloth I mentioned but the copper ground plane can clearly be seen on both the body and screen. Fake and non oem parts tend not to have this, in the body there is also a copper area which can be removed by mistake on replacement of the screen.
this is not often found in the replacement screen kit.
i doubt it the the problem with my house wiring since it is the same with my other house but thanks for the suggestion. i will definitely try wearing shoes when i am at a different house. maybe both my house got wiring problem.
i learnt a lot from your post. thanks for your time and i hope to hear from u soon
Click to expand...
Click to collapse
if it's happening at another location then you can discount this theory.
I am still leaning towards incorrect parts or assembly as this is the cause I personally see most often and i've repaired a LOT of damaged phones. As you have stated you have more or less a complete new phone if they replaced screen+motherboard.
I once repaired a phone that had been back to the OEM service center, cause of fault was copper strip from old screen touching the board, the copper slip was so small i only noticed it when it sparkled under the right light, it's mistakes like that is what I am talking about, easily missed by many.
darkspr1te
how do i check if my phone has the copper strip or not?
i am going to bring my phone to the samsung store tomorrow and hope for some answers regarding the copper strip. thanks darkspr1te
how do i check if my phone has the copper strip or not?
i am going to bring my phone to the samsung store tomorrow and hope for some answers regarding the copper strip. thanks darkspr1te
darkspr1te said:
It wont be 100% of the cause but will affect performance of the screen.
Yes, using a non-mains connected charger will be sufficient for the test, like your power bank for example
Yes,
Galaxy Alpha Images
Note on images 4 and 5 you will see the copper shield, this model does not have the conductive cloth I mentioned but the copper ground plane can clearly be seen on both the body and screen. Fake and non oem parts tend not to have this, in the body there is also a copper area which can be removed by mistake on replacement of the screen.
this is not often found in the replacement screen kit.
if it's happening at another location then you can discount this theory.
I am still leaning towards incorrect parts or assembly as this is the cause I personally see most often and i've repaired a LOT of damaged phones. As you have stated you have more or less a complete new phone if they replaced screen+motherboard.
I once repaired a phone that had been back to the OEM service center, cause of fault was copper strip from old screen touching the board, the copper slip was so small i only noticed it when it sparkled under the right light, it's mistakes like that is what I am talking about, easily missed by many.
darkspr1te
Click to expand...
Click to collapse
how do i check if my phone has the copper strip or not?
i am going to bring my phone to the samsung store tomorrow and hope for some answers regarding the copper strip. thanks darkspr1te
JssCheonGz said:
how do i check if my phone has the copper strip or not?
i am going to bring my phone to the samsung store tomorrow and hope for some answers regarding the copper strip. thanks darkspr1te
Click to expand...
Click to collapse
Sadly that can only be done by removing the screen. I dont suggest you try, ive seen the disassembly video, it's tough, one time job and if it goes wrong it's bye bye screen.
darkspr1te
darkspr1te said:
Sadly that can only be done by removing the screen. I dont suggest you try, ive seen the disassembly video, it's tough, one time job and if it goes wrong it's bye bye screen.
darkspr1te
Click to expand...
Click to collapse
I sent in my phone to the samsung store to check the charging port (which is also making some problems), and i requested them to check the copper shield.
while i was there, i realised there is another phone which has the same problem as me. could it be that all the A5 model has the same problem ? :/
JssCheonGz said:
I sent in my phone to the samsung store to check the charging port (which is also making some problems), and i requested them to check the copper shield.
while i was there, i realised there is another phone which has the same problem as me. could it be that all the A5 model has the same problem ? :/
Click to expand...
Click to collapse
I don't think it's the phone model, we would see more reports if it was, I would enquire if the other unit also had screen changed. If it has then one might assume pirate parts, no way to prove that without checking back of lcd for the oem barcode sticker. The is on possibility I only just thought of, a while back I had a client bring me a i9505 that the oem changed screen on, I just reread the emails between us and the fix was replacing the screen with a i9505 screen, the oem locally only supplies i9500 devices so they only fitted a i9500 screen, turns out there is a difference in the touch chip, I was able to prove this by attaching the touch only circuit from his old screen. No more random touches.
From this I can assume the various SM-A500 models use different touch chips. Or slightly different firmware in the chip, I have seen that before on the rock chip based tablets I support here.
Darkspr1te
darkspr1te said:
I don't think it's the phone model, we would see more reports if it was, I would enquire if the other unit also had screen changed. If it has then one might assume pirate parts, no way to prove that without checking back of lcd for the oem barcode sticker. The is on possibility I only just thought of, a while back I had a client bring me a i9505 that the oem changed screen on, I just reread the emails between us and the fix was replacing the screen with a i9505 screen, the oem locally only supplies i9500 devices so they only fitted a i9500 screen, turns out there is a difference in the touch chip, I was able to prove this by attaching the touch only circuit from his old screen. No more random touches.
From this I can assume the various SM-A500 models use different touch chips. Or slightly different firmware in the chip, I have seen that before on the rock chip based tablets I support here.
Darkspr1te
Click to expand...
Click to collapse
this is getting a little too complex for me to understand, let alone explaining it to the samsung guy. are u trying to say touchscreens from different variants of A5, such as SM-A500G is being fitted into my SM-A500F?
JssCheonGz said:
this is getting a little too complex for me to understand, let alone explaining it to the samsung guy. are u trying to say touchscreens from different variants of A5, such as SM-A500G is being fitted into my SM-A500F?
Click to expand...
Click to collapse
Yes, that's exactly what I am saying. Although it's only a theory based on prior solutions, I dont have any proof to hand other than my experience.
darkspr1te
Battery issue
My galaxy A5 have some battery issue. It won't charge after 88%,and didn't turn off after 2%. The phone is turn on over night at 2%..please help me regarding this issue.
Did anyone faced issue - on wireless charger, screen touch response is bad or weird to operate. Note: it happens only if i enabled high touch sensitivity option.
YES!!!
I haven't tried shutting off the screen sensitivity though. I just got a wireless car charger/cradle, so now I have a reason to be using my phone while it is wirelessly charging. To me it seems to be related to the section of the screen. The top half of the screen seems to miss occasional touches, but that even happens when it's not charging sometimes. Bottom half of the screen is OMG awful. Missed touches, extra touches, touches randomly off in some weird direction, long presses when I didn't long press, moving/dragging when I didn't move. Try typing on the keyboard if you want a fun time. It took me *SEVEN* attempts to type "Here". It kept grabbing the wrong keys, hitting the spacebar in the middle of the word, just bizarre random stuff. I couldn't even recognize what was being typed...
that's not a bug my friend - that's an issue normally associated with a cheap wireless chargers or non-OEM wireless charger.
Tried this on my 9+ with a Ravpower fast charger and have no issues with touch screen sensitivity or typing on the keyboard.
Yes! Holy ****!t, thought I was just imagining things. I experience it with my OEM 2018 Convertible wireless fast charger.
Sent from my SM-G965U using Tapatalk
Yeah, happens with me when I use a cheap wireless charger.
I use an iottie fast wireless charging cradle in my car and often the touch screen is finicky. I haven't tried turning off touch sensitivity.
jazzespresso said:
that's not a bug my friend - that's an issue normally associated with a cheap wireless chargers or non-OEM wireless charger.
Click to expand...
Click to collapse
Do you know what scientific or engineering principles are causing this to happen? Is the electromagnetic field generated by the induction coils somehow interfering with the screen's capacitive interaction? I have only used my finger. I should try a stylus to see if there is a difference.
---------- Post added at 03:54 PM ---------- Previous post was at 03:48 PM ----------
I have a developer option turned on to draw a small dot to indicate where you touched the screen. Yesterday I was watching as I repeatedly touched the screen in the same spot. I did not move my finger from that spot. Just lifted and tapped over and over. The dot drawn moved around quite a bit. Mostly high or low, by about 1/2". The phone was somehow getting false readings about where I was touching. No wonder I had such issues with the keyboard. I have noted that pressing harder with my normal use, *does* improve its ability to sense the touch accurately. I was not really testing that with the repeated touches though.
Brokk said:
Do you know what scientific or engineering principles are causing this to happen? Is the electromagnetic field generated by the induction coils somehow interfering with the screen's capacitive interaction? I have only used my finger. I should try a stylus to see if there is a difference.
---------- Post added at 03:54 PM ---------- Previous post was at 03:48 PM ----------
I have a developer option turned on to draw a small dot to indicate where you touched the screen. Yesterday I was watching as I repeatedly touched the screen in the same spot. I did not move my finger from that spot. Just lifted and tapped over and over. The dot drawn moved around quite a bit. Mostly high or low, by about 1/2". The phone was somehow getting false readings about where I was touching. No wonder I had such issues with the keyboard. I have noted that pressing harder with my normal use, *does* improve its ability to sense the touch accurately. I was not really testing that with the repeated touches though.
Click to expand...
Click to collapse
you have to ask yourself two things;
1. is screen touch response happening while it was on wireless charger?
2. or is screen touch response happening while using your phone regularly even without not on charger?
if your answer is #2 or both #1 and #2, you should contact where you bought and exchange it. However, if your issue is #1 only, I would try to use different wireless charger to test and see.
Also keep in mind that Exyons version fo S9/S9+ has plagued with touch screen issues (i do believe this is also officially confirmed by Samsung);
https://www.techradar.com/news/sams...ouchscreen-dead-zones-heres-how-to-test-yours
jazzespresso said:
you have to ask yourself two things;
1. is screen touch response happening while it was on wireless charger?
2. or is screen touch response happening while using your phone regularly even without not on charger?
if your answer is #2 or both #1 and #2, you should contact where you bought and exchange it. However, if your issue is #1 only, I would try to use different wireless charger to test and see.
Also keep in mind that Exyons version fo S9/S9+ has plagued with touch screen issues (i do believe this is also officially confirmed by Samsung);
https://www.techradar.com/news/sams...ouchscreen-dead-zones-heres-how-to-test-yours
Click to expand...
Click to collapse
I have Snapdragon.
Initial testing on another charger seems better (not perfect). I am going to play with placement to see if that makes a difference.
same problem here. running on stock fw with stock wireless charger... tried several version of samsung wireless chargers and all results the same
I have same issue https://forum.xda-developers.com/ga...rger-screen-sensitivity-t3779923/post76283002
Better to avoid wireless charger. So that screen can b saved in long run.
command said:
Better to avoid wireless charger. So that screen can b saved in long run.
Click to expand...
Click to collapse
For my car, I just leave the phone in the wireless charging cradle, since I don't use the phone while driving, then if I need more than incidental contact with the screen while it's in the cradle, I just unplug the power source and the touch screen goes back to normal behavior. Annoying, but not unworkable.
I prefer the wireless charging because of past phone experiences where the charging port got damaged from needing to plug/unplug the phone so often. Unplugging the power source for the cradle is easy and not so likely to damage anything.
I had a fun one today I took my phone *off* the wireless charger and the touch screen went crazy. The dot showing where I was touching at the moment, was flickering down by the home button like it was the fire button on a video game. However, I wasn't touching the screen at all. So I shut the screen off (because no matter where I touched it just ignored me and kept mashing the home button). Then tried to turn it back on and nothing would happen. Normally when I get stuck like this I put it on the charger and it forces the screen on. I did that and the screen came on but it still wouldn't take my touch. So I finally had to reboot.
Did anybody was able to put the finger on the problem about touch issue with wireless charging?
(Finger on the problem...... did you get it..ok ok, need more beer)..
Again, we are taking about problem #1-: screen touch response problem happening only while it is on wireless charger!)
How does a "cheap" or none OEM wireless charger would affect the Touchscreen?
Mag field too strong? Android software disable touch while wrls/charging?
Can we lower some parameters on the phone trying to alleviate the issue?
I normally pick up my phone from the charger to use it, but out of curiosity, I just tried it on the charger, and have no problems. The charger is a Pleson Fast Charge model C500.
Try with high touch sensitive enabled. You might get issue.
UPDATE 2: Sadly the situation has worsened during the period and the touchscreen loses responsiveness much more often that some games are virtually unplayable. I've moved the games back to my good old Pixel C. Although it's indeed ill-equipped to play some newer games (that they have very low framerate and could sometimes slow down to a near-frozen state, even on lowest detail settings), at least I've no issues with its touchscreen, just that games may get too low framerate to accurately register them on time.
Should point out that S-Pen is apparently not affected by this issue, even with GSI, because S-Pen is treated as a pointer device (with significantly higher sampling rate) and in most cases does not count as touchscreen taps but instead count as left-clicks (e.g. games that exclusively expects touchscreen taps rather than mouse clicks would not respond to S-Pen taps, which is intended). Because of this, whenever I have the issue in-game I always need to pull out the S-Pen to perform some actions, like opening up the ingame menu, or bring up the navbar and go back to home screen, as I usually would have difficulty doing it directly with fingers whenever that happens (usually needs 3-4 taps/swipes to actually get it register once, but with S-Pen it always worked on first try).
Maybe I indeed have a faulty hardware (it doesn't matter anymore now that I've voided my warranty), but the possibility that software issues are contributing to the problem remains high, so for now I have no other choice but to follow kernel and ROM development process for a while to see if there are possible fixes/mitigations. Given this experience, I'm considering looking for another Android tablet with similar features this year but I'm yet to see one (especially considering 120Hz), and of course, I most likely won't get another Samsung device for serious purposes from this point on.
EDIT: Guess this Reddit thread about Galaxy S20 FE is relevant as many issues mentioned there seem to match mine... so this might be an issue specific to Samsung in overall, not just this device.
UPDATE: I'm putting the original post inside a spoiler as the old stuffs were a bit messy and outdated. Most of the original post were written during Android 10 and things have changed quite a bit since then.
Simply put, the touchscreen of this tablet is a bit problematic which makes it not a good idea for serious gaming, though it doesn't seem to affect office/production use as much.
The cause is still unknown and I can't be sure if this is due to hardware or software, or a mix of both. Should point out that the issues persist after switching to a GSI, so the stock ROM is not entirely to blame.
Some ongoing issues:
1. Touches randomly fail to register, and with inconsistent response time (sometimes early or late than average).
2. Touchscreen occasionally stops responding, dropping or delaying a lot of taps. This has become worse since BUD2 as I started having longer periods, and now virtually no touches get registered when it happens. I wonder if this is a side effect of the ghost tap mitigations, as this becomes significantly worse since BUD2 while I hardly ever get any ghost taps since then.
3. Jittery scrolling. Apparently I'm having this issue for quite long. Bounces (a quick scroll in reverse direction) can happen in apps when releasing the finger after scrolling. In games, this bounce registers as an additional flick. Should note that this is actually an indicator of the problem. Whenever I start noticing additional flicks being registered, the actually problem (touchscreen losing nearly all responsiveness) will likely kick in after a while.
Some issues appeared to have been mitigated after FW upgrades:
1. Ghost taps during holds and swipes. This has become lessened since Android 11 and is mostly gone since BUD2.
2. Random auto taps at the edges of screen. Haven't gotten once since BUC1 but I can't be sure it's really gone away.
3. Touches may get registered prematurely (when finger is still a few millimeters away from the screen). This has become lessened since Android 11.
Spoiler: Original post (messy and may be outdated)
It seems the tablet's touchscreen has several issues that I cannot be sure whether the issue is hardware related, software related, or a mix of both. I've been following this thread, but it seems the issue I'm having is more than what the OP was having so I'm considering moving the questions here.
I'm currently experiencing a variety of issues with the touchscreen that, while not a major problem for normal use, can be a serious issue for some games where accurate taps matter. However, the issue is very hard to track as while the problem happened a bit too often inside games, I couldn't easily reproduce the issue outside those games on testing apps despite trying to mimic the original situation. Although the game itself might be having issues, I don't think it's likely as I've played some of them on my smartphone before migrating them to this tablet and I never had any significant issues back then.
The tablet currently has a a tempered glass screen protector installed, and I'm using the tablet with a Type-C audio cable to play its audio from my desktop speakers. (NOTE: S7/S7+ has limited accessories support, that for now, I can only either charge or connect the tablet to the speakers, but not both, as splitters aren't supported) The possibility of the audio cable can be mostly ruled out as I'm encountering those touch issues both with and without it.
The tablet underwent about 3-4 updates and is currently up-to-date. I don't think there were any difference in this among the versions.
Here's what I've found about my tablet's touchscreen:
(DISCLAIMER: I can't prove the reliability of the app used for testing, Multi Touch Test, so it's mostly a reference in case someone wants to try to reproduce. There are more apps that can be used for such testing.)
1. Touchscreen may sometimes not registering taps, or late. In some games this is observed as some taps missed, or registered late (a tap/hold being recognized by the game as much as ~1s later). However, I can't really reproduce this in the test app.
2. Touchscreen may register touches before the finger physically reaches the screen (about 1-2 mm). I'm not sure if static electricity can cause it and this might be considered a normal behavior, but personally I'm feeling the response range is still too long compared to other phones/tablets I have, that it's easier to accidentally tap something, or let something register too early.
3. A tap may be registered more than once. It appears to be easier to reproduce when doing multi touches, but it still happens in some games with fewer simultaneous taps. I managed to get 5 touch/hold events registered with the test app despite using only 4 fingers (4 real touches) sometimes. Although I know bad charger cables can cause this (as well as other erratic touch behaviors), in my case there were no chargers attached (since the port's already been used by the audio cable).
4. When holding and dragging, additional taps may be generated (it can be noticed in some games that have tap sounds for all taps, including invalid ones, as these additional "taps" can be heard). Again, this appears to be easier to reproduce when doing multi touches, as I'm able to occasionally get 5-6 touch events when dragging with only 4 fingers. The drag itself seems consistent, as I haven't observed any abrupt interruptions of valid dragging actions in-game and in other places.
UPDATE (2020.11.22): At one time I was able to reliably reproduce the problematic behavior at some specific regions with the Multi-Touch Test app. To be precise, with the tablet placed landscape (camera facing up), while holding the lower-right part of the screen with my right hand finger, holding and dragging the lower-left region with my left hand finger resulted in a ghosted, inconsistent 3rd tap near where my left hand finger was holding/dragging (matching the issue I'm currently having within some games). It seems for some reasons that particular region of the touchscreen is indeed oversensitive as I was also able to reliably reproduce issues 2/3 at that time. The issue mostly went away after powering the device off and cleaning the screen as I was not able to reproduce it afterwards. Not sure about my current protector's quality, but I might need to look for an option that's more sweat-resilent, as my hands tend to produce sweat over time and that used to cause some serious issues with touching.
5. While testing in the test app, The taps might be stuck if I also let finger pads touch the screen while holding it with fingertip, and it stayed there even after I released my hand and touched elsewhere. Make as many multi touch events might clear it. Not sure if this is a normal behavior (possibly related to palm-related interactions such as palm swipe to take screenshot), or is an error with the test app itself.
6. In rare cases, the touchscreen would stop responding to most of the taps which I suspect this might be hardware related as the issues occur at specific regions. I used to experience such issues with iPads before (4th gen and Pro 2015) which is why I decided to go on with Android-based ones. This issue is not consistent and would go away after a while so usually pausing and doing something else would work.
UPDATE(2020.12.13): I witnessed something interesting. When the tablet stops registering the taps, it might be due to it continuously generating ghost taps on some screen edges near the last few spots I previously touched, completely on its own (my hands weren't even near the tablet). The issue went away after reboot. I forgot to make a logcat as I was in a bit hurry... I'm currently on the November update, but the issue happened even before the updates. It doesn't frequently happen, though.
UPDATE: This is after using the tablet a bit more...
1. Having a screen protector may or may not affect touches, but usually should not be significant, unless the protector is of very poor quality. The market for such can be a bit messy, and quality varies even with the same product. A same protector might work very well for some, but not for others.
2. Under my current circumstances, my S7+ can at most reliably take 3 multi-touches, and sometimes 4 (despite the touchscren can register at most 10). Putting more multi-touches would gradually cause the touch sensor to err and become unable to register taps on time. (While I usually use at most my index and middle fingers, sometimes things can get too complicated that requires me to use my ring fingers as well, and that's when touch-related problems usually start to occur).
3. Although not that often, when the touchscreen started to err, touches might randomly get registered even with my finger hovering quite a few millimeters above the place I'm thinking about touching. I'm still looking for the reason why.
4. The effectiveness of Touchscreen Repair is still uncertain, but it seems to work to some extent to help mitigating issues. However, it doesn't appear to allow me to repeatedly calibrate the screen.
5. Forcing the tablet to run at 60Hz (Motion Smoothness: Standard) would mitigate touch issues with some games that can't really achieve 120fps with most effects turned on. Sadly, some games can be quite demanding even on this tablet's SoC. Some touch issues are more likely to reproduce when the system starts to stutter, so it may be a good idea to turn off some effects if feasible. Not sure if the overall performance can be improved with a custom kernel in the future.
I've had similar issues with mine, during game play - it starts off fine, then the screen starts to lag and many missed inputs... Had an update yesterday, but haven't tried it yet
cheetah2k said:
I've had similar issues with mine, during game play - it starts off fine, then the screen starts to lag and many missed inputs... Had an update yesterday, but haven't tried it yet
Click to expand...
Click to collapse
Not sure what might be causing the issues. While not really an issue for normal use, but in some games it can be really frustrating to find it so difficult to full combo even on lower difficulty levels such as Easy because at least one tap would fail to register correctly in almost every play.
In my cases, the tablet mainly lags/stutters when it throttles due to overheat (if played for a prolonged amount of time). There's really no easy fix for that issue as it's very normal for such beefy SoCs to reach high temperatures.
Honestly, the tablet is too bloated in terms of touchscreen-related features (like S-Pen and palm gestures). Not sure if the touchscreen sensitivity was adjusted to make sure these features work without major issues, which in turn can cause some side effects that only gamers would find them annoying. The touchscreen is indeed oversensitive as some other people have reported, that touches sometimes get registered too easily to the point that it sometimes results in undesired touches, such as being too early (registered before the finger actually landed), or ghosted (a touch appeared as two or more).
Back then I got myself a Pixel C that I flashed with custom ROMs since day one and I never had any issues like this. Although it started developing similar symptoms later on, it turned out to be caused by a swollen battery and the issues went away after replacing it.
Unlike that time, for S7+ I hardly ever had the charger plugged (only when I turned it off and when the battery is really getting low), and there are also no apparent signs of a potential battery issue developing as far as I can see.
EDIT: I'm yet to be able to get another update... but it seems with prolonged gameplay the tablet may become very hot and the touchscreen becomes completely erratic in-game despite the game itself might not be stuttering (and sometimes this would cost me dearly).
I suspect when the SoC overheats the throttle impaired the system's touchscreen recognition and the reason why I'm not able to reproduce every issue outside games is that the tablet would not be as hot as when in-game due to reduced load. Guess I need to look for a way to keep the tablet cool while playing... Once again, it the nature for such beefy SoC to overheat over time.
Bumping this myself as I discovered something.
It seems forcing the S7+ to 60fps (Display -> Motion Smoothness -> Standard) can significantly mitigate the repeated/ghosted taps issue, and varying improvements regarding other touchscreen issues. I cannot say the issue is completely gone this way as I still encounter it from time to time, but with the tablet running at 60fps these issues are significantly less frequent to happen.
Either some background services might be interfering, or that some games can't really handle 120fps with most effects turned on. Guess I might need to experiment on how to disable certain system apps/features that I don't use and can't be disabled normally from the App settings, to further reduce background resource consumption. Hope the pm shell commands can work even without root.
As for stuttering, if caused by the tablet being overheating badly, placing it on a laptop cooling pad (that has fans in it) might help reducing the device's temperature a little bit. Also, tablet covers may block the airflow and limit such method's effectiveness, but I'm worried that the tablet's body might be too slippery without an appropriate cover to maintain enough friction to prevent the tablet from moving while using it.
EDIT: It seems some apps could misbehave when tapping repeatedly somehow (for trying to quickly skip some result screens)... and taps would start registering late, as late as ~1s. It appears as when tapping on a button, at first nothing happens, about a second later the tap against the button gets registered and things would proceed. The problem usually goes away after restarting the app.
The tablet currently has a a tempered glass screen protector installed,
Sorry I did not read All you wrote, I have S7+5G with latest Nov Update.
Personally I would REMOVE the Screen protector, do not like them and they create UI problems, why do you think you need one?, are you rough with Tablet (or Phone), just clean class regularly, try it??
MyAndroids said:
The tablet currently has a a tempered glass screen protector installed,
Sorry I did not read All you wrote, I have S7+5G with latest Nov Update.
Personally I would REMOVE the Screen protector, do not like them and they create UI problems, why do you think you need one?, are you rough with Tablet (or Phone), just clean class regularly, try it??
Click to expand...
Click to collapse
I cannot rule out the screen protector might affect input, but personally the impact on input sensitivity/precision with tempered glass ones is not that significant. With this tablet I do regularly clean the screen. Nowadays I also use such protectors on my phone, and I hardly ever had any touch-related issues directly caused by screen protectors.
On the other hand, a long time ago I had an iPad Pro which started developing similar symptoms (missed taps, interrupted holds). Back then I had a PET screen protector installed on it, and because of that I removed the protector later on, thinking that might be the culprit, but the symptoms were still there, so the screen protector was NOT the real issue.
And honestly my fingers can indeed be a bit rough with tablet and phones that it's necessary to install a protector, or it'll leave some permanent marks after prolonged use (that when I clean the screen, the areas that I swiped most frequent during gaming would be visible).
EDIT: Not sure when did the November update come out. My device is still on October update and as of now no new updates are available.
EDIT 2: Will update the OP a bit.
EDIT 3: I think some Samsung stuffs is indeed interfering (or at least taking up precious resources) as I did a logcat and noticed something mentioning Game Manager (which I do not want to activate, but it doesn't appear to be disabled completely). Does anyone have a good list about what I can safely disable via adb?
LSS4181 said:
I cannot rule out the screen protector might affect input, but personally the impact on input sensitivity/precision with tempered glass ones is not that significant. With this tablet I do regularly clean the screen. Nowadays I also use such protectors on my phone, and I hardly ever had any touch-related issues directly caused by screen protectors.
On the other hand, a long time ago I had an iPad Pro which started developing similar symptoms (missed taps, interrupted holds). Back then I had a PET screen protector installed on it, and because of that I removed the protector later on, thinking that might be the culprit, but the symptoms were still there, so the screen protector was NOT the real issue.
And honestly my fingers can indeed be a bit rough with tablet and phones that it's necessary to install a protector, or it'll leave some permanent marks after prolonged use (that when I clean the screen, the areas that I swiped most frequent during gaming would be visible).
EDIT: Not sure when did the November update come out. My device is still on October update and as of now no new updates are available.
EDIT 2: Will update the OP a bit.
EDIT 3: I think some Samsung stuffs is indeed interfering (or at least taking up precious resources) as I did a logcat and noticed something mentioning Game Manager (which I do not want to activate, but it doesn't appear to be disabled completely). Does anyone have a good list about what I can safely disable via adb?
Click to expand...
Click to collapse
I can send you the list of what I have disabled on my Tab S4 with android 10. After many trials and errors nothing crashes. Well rules of survival crashes from time to time but I think it might be normal. I left the game mode. Feel free to get rid of it. I based my list on some galaxy S10 debloat threads if I remember correctly. There were some pretty detailed lists. Note that I'm not rooted. I have tried to root but there was more hassle than positive effects.
Ok I got an S7 plus 8/256. The hardware is a beast but the touch screen shows the exact same problems of the non plus version I had tried some weeks ago.
While playing rules of survival, sometimes the left thumb that controls the movement loses the touch and the character gets stuck. Since I play with a pair of triggers, sometimes the left trigger gets irresponsive and my weapon cannot shoot steadily. The right portion of the screen seems to be less affected by this kind of problems. I should flip the tablet and test the opposite side. I am using a glass screen protector. It might be affecting the touch performance, but I'm not entirely sure, since it has been applied without any bubble.
The option to disable unwanted touches is obviously disabled. I did not touch any of the other options about the long press timing or the other one that I cannot remember now.
I have tried a screen testing app and I did not see any ghost touches or other issues.
This is getting annoying. I have 3 weeks before I cannot send it back to Amazon. I bought it on the German warehouse.
Hi All, I have the exact same problem... have you found any solution or Samsung helped you?
nyersike said:
Hi All, I have the exact same problem... have you found any solution or Samsung helped you?
Click to expand...
Click to collapse
I've unlocked and rooted the device as I tried to look into the issue further so I can't really rely on Samsung anymore. I haven't really updated the thread since then as I've been busy and am trying to live on with the issue which I think it's just natural for touch screens to have issues and I really can't avoid such...
With Android 10 FW, the issue seems to be able to affect everywhere as I could witness them happening in home screen and in touch test apps. However, things become different with Android 11 that the issue seems to be constrained to the particular app/game and I could no longer reliably reproduce them outside, only in some rare cases.
Since the BUD2 upgrade, I noticed that the additional taps I used to have during swipe/flick actions mostly disappeared, indicating some form of mitigations. However, with BUD2 I had times where touchscreen stopped working almost completely. Nearly all taps were dropped during the period that I couldn't pause the game nor call out the navbar, until I held the power button that caused the game to lose focus (pausing it in the process), and then touchscreen works again. Either I have a faulty hardware, or at that particular moment there were no CPU cores handling the incoming touch inputs at all.
I'm still looking at what might be causing the issue, but the logcat is too bloated to read, and I still need time to understand the meaning of every line in the kernel dmesg I dumped while playing and experimenting.
In overall, the tablet's framerate is very unstable while playing. On games that limit themselves to 60fps regardless, the game feels janky despite the framerate shown on PerfMon stayed stable at 60. On the other hand, the same games looked very fluid on my SD845-powered Razer Phone 2. I'm starting to wonder, if SD845 is a perfect SOC1 example, and SD865+ being a perfect SOC2 example, for this testcase.
Although I have systemlessly removed GOS via Magisk, it doesn't seem to have it removed completely as there are some logcats coming from system_server mentioning about GOS (especially, a watchdog), just that it couldn't find the apk to reinstall/re-enable. Also, I noticed some kernel dmesg lines containing "Input Booster" talking about something like "Del Ib instance" and I wonder if it has anything to do with GOS (as GOS stuffs tend to call themselves Boosters, like Game Booster).
Still, I'm noticing something that might be affecting the system performance. One of the games I play on the tablet could normally manage to reach near 120fps in-game, but it falls to 30-40 fps ingame after the app loses focus (e.g. switching to home screen or to another app) for at least once. Setting Motion Smoothness to Standard (60Hz) in this case would only make matters worse as it further cut the framerate by half (that is, I have 30-40fps before setting to 60Hz, after that I only get about 10-20fps). It may be because of the game itself (that's based on Unity), but I'm not perfectly sure. For that particular game I need to force close it and run it again in order to make it able to reach 120fps in-game again.
I have used SmartPack to set the GPU on performance governor with power level set to 0, in order to actually keep it on 670MHz as otherwise it stayed on 305MHz most of the time which I suspected it might be the cause of the performance issues, but right now, I'm seeing little gain in video performance and I noticed that the GPU clock can still go down to 525MHz after a while, something which I don't think it should happen on performance governor.
LSS4181 said:
Not sure what might be causing the issues. While not really an issue for normal use, but in some games it can be really frustrating to find it so difficult to full combo even on lower difficulty levels such as Easy because at least one tap would fail to register correctly in almost every play.
In my cases, the tablet mainly lags/stutters when it throttles due to overheat (if played for a prolonged amount of time). There's really no easy fix for that issue as it's very normal for such beefy SoCs to reach high temperatures.
Honestly, the tablet is too bloated in terms of touchscreen-related features (like S-Pen and palm gestures). Not sure if the touchscreen sensitivity was adjusted to make sure these features work without major issues, which in turn can cause some side effects that only gamers would find them annoying. The touchscreen is indeed oversensitive as some other people have reported, that touches sometimes get registered too easily to the point that it sometimes results in undesired touches, such as being too early (registered before the finger actually landed), or ghosted (a touch appeared as two or more).
Back then I got myself a Pixel C that I flashed with custom ROMs since day one and I never had any issues like this. Although it started developing similar symptoms later on, it turned out to be caused by a swollen battery and the issues went away after replacing it.
Unlike that time, for S7+ I hardly ever had the charger plugged (only when I turned it off and when the battery is really getting low), and there are also no apparent signs of a potential battery issue developing as far as I can see.
EDIT: I'm yet to be able to get another update... but it seems with prolonged gameplay the tablet may become very hot and the touchscreen becomes completely erratic in-game despite the game itself might not be stuttering (and sometimes this would cost me dearly).
I suspect when the SoC overheats the throttle impaired the system's touchscreen recognition and the reason why I'm not able to reproduce every issue outside games is that the tablet would not be as hot as when in-game due to reduced load. Guess I need to look for a way to keep the tablet cool while playing... Once again, it the nature for such beefy SoC to overheat over time.
Click to expand...
Click to collapse
The touchscreen went unresponsive today again and I noticed these in the kernel dmesg... Actually, similar dmesg entries happen all the time while the device is running, I just took something that looks relevant.
[ 708.540205] IRQ 5: no longer affine to CPU6
[ 708.561407] fts_touch 4-0049: [sec_input][P] tID:0.1680 z:23 major:16 minor:13 loc:C.C tc:1 type:0 p:0 nlvl:1 maxS:134 hid:0
[ 708.561538] set_freq_limit: id(1) freq(1401600)
[ 708.561548] cpufreq_limit_get: touch min same values(1401600,0) entered. just return.
[ 708.618420] fts_touch 4-0049: [sec_input][R] tID:0 loc:C.C dd:-7,1 mc:6 tc:0 p:0 nlvl:1 maxS:137 hid:0
[ 708.692113] set_freq_limit: id(1) freq(1401600)
[ 708.692130] cpufreq_limit_get: touch min same values(1401600,0) entered. just return.
[ 708.832303] [Input Booster] Release Timeout Func :::: 71's TV No Exist(1)
[ 708.832380] [Input Booster] Release Timeout Func :::: 71's TV No Exist(3)
[ 708.832399] set_freq_limit: id(1) freq(1401600)
[ 708.832412] cpufreq_limit_get: touch min same values(1401600,0) entered. just return.
[ 708.832479] [Input Booster] Del Ib Instance's Id : 71
[ 708.860192] IRQ 5: no longer affine to CPU7
I've set my CPU governors to ondemand and set a much higher minimum clock just because it tends to underclock, yet from the dmesg it's still trying to underclock to a value lower than that.
Also, I noticed several "Release Timeout Func" entries that seems to match the moments when touchscreen stopped responding to almost anything. Again, I don't know what this "Input Booster" really is. It's still hard to determine what exactly happened, though.
Tablet have some serious display problems.
I have sent mine already third time to repair and having same issue all the time.
First time they changed display on it, second time apparently couldn't find any issues. Now i send it third time and waiting to see what's going to happen.
ahaznada said:
Tablet have some serious display problems.
I have sent mine already third time to repair and having same issue all the time.
First time they changed display on it, second time apparently couldn't find any issues. Now i send it third time and waiting to see what's going to happen.
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Just saw your video. It seems your issue is much worse and more consistent than the ones I'm having.
I don't know if the game engines can also be related, as one of my games uses Unity and the issues happened there most of the times. In other games the issues are less often but still present.
From the looks of it, despite its specs the tablet is not really meant to be used for serious gaming. The SOC might be good, but the touchscreen hardware certainly isn't.
I guess one is supposed to be using S-Pen most of the time for some office/production activities. From what I tested on GSI, S-Pen is considered a pointer device with significantly higher sampling rate. When testing using Touch Screen Benchmark app, with my finger I get 120 touch points per second, but with S-Pen I get about 360 touch points per second.
I'm not sure what Samsung might do to test/repair the touchscreen but I certainly can't ask them anymore, as my warranty is already void (0x1).
LSS4181 said:
Just saw your video. It seems your issue is much worse and more consistent than the ones I'm having.
I don't know if the game engines can also be related, as one of my games uses Unity and the issues happened there most of the times. In other games the issues are less often but still present.
From the looks of it, despite its specs the tablet is not really meant to be used for serious gaming. The SOC might be good, but the touchscreen hardware certainly isn't.
I guess one is supposed to be using S-Pen most of the time for some office/production activities. From what I tested on GSI, S-Pen is considered a pointer device with significantly higher sampling rate. When testing using Touch Screen Benchmark app, with my finger I get 120 touch points per second, but with S-Pen I get about 360 touch points per second.
I'm not sure what Samsung might do to test/repair the touchscreen but I certainly can't ask them anymore, as my warranty is already void (0x1).
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I have same issues on all apps not just games like internet browsers, play store even on home screen
ahaznada said:
I have same issues on all apps not just games like internet browsers, play store even on home screen
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On Android 10 I used to have similar situations that when it happens, I would still be affected by it even after switching out the game. On Android 11 it seems to mostly affect the particular game and would mostly go away when I switch back to home screen. I usually would test if the issue's still there in the Touchscreen Benchmark app, but in most cases I couldn't reproduce it there (mainly the Sensitivity test). Of at least 40 test attempts, I only managed to record actual interruptions once, plus a few actual delays (a few missed areas near the beginning).
On the other hand, actually Android does differentiate between touchscreen taps and "mouse" clicks. S-Pen taps are considered "left clicks" and would not work on games I play (just tested it and found out), although games usually do allow such "left clicks" to function in other places like menus. This is how it behaves in GSIs. Maybe it behaves differently in stock ROM but I didn't pay too much attention.
But in overall the tablet's touch response time is not stable. I get much more inconsistent numbers when calibrating touch timings in some games, compared to my phone and my old tablet, Pixel C.
Sadly the issues persist even after I switched to a GSI (it made no noticeable difference). I'm starting to wonder if there really is something wrong with the hardware, though I couldn't really find any really helpful info from logcats and kernel dmesgs that could point out the real cause. Again, RMA is not an option as my warranty has already been voided at this point.
Not sure that all S7+ have this issue or only a few people have this issue, but mine has that issue too.
I purchased the S7+ to use as a second monitor, so didn't notice earlier.
2 months later, I started playing a driving game. While playing the game, suddenly 3" whole left side touchscreen is not responding. After 1~2 seconds, it comes back to normal. And then suddenly it stops for 1~2 seconds and then comes back to normal, repeat.
I flipped the table and played the same game. Then, the right side is the problem. Yeah, as other people also have the issue on the left side, the S7+ really has an issue on the left side.
I installed a tempered glass screen protector and Poetic Revolution case. When I play 10 matches with the screen protector and case, the touch screen issue occurred 2~4 times. Without the screen protector and case, the touch screen issue occurred 0~2 times. Much better, but can't say it is normal.
When I play the same game using my Essential Phone[PH-1], it doesn't have the issue.
I purchased the S7+ three months ago, so claimed a warranty. Not sure Samsung can fix this issue or return without fixing it or fixed it but made more issues. Let's see.
I have same issues on all apps not just games like internet browsers, play store even on home screen
Yachoparis said:
I have same issues on all apps not just games like internet browsers, play store even on home screen
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Yeah, it doesn't just affect games. It's just some games show symptoms easier than others, probably due to load or maybe optimization-related reasons. Also, in one of the games, I started to feel noticeable touch lags which I didn't notice before (not sure which side caused the issue).
With GSI, it seems touchscreen may not be responsive at startup, that sometimes I have difficulty drawing my lockscreen pattern correctly until the system stabilizes a bit.
I don't know if there are any prebuilt binaries for the `frameworks/base/tests/TouchLatency` test (mentioned here) available, so I can further examine if the issue I'm having is hardware or software related.
Maybe the issue is a mixture of both, as one time, when I had the issue in game I was able to pause the game just fine with my S-Pen (technically on GSI, S-Pen taps are considered left-clicks instead of touchscreen taps so it probably was not affected). I can't be 100% certain, though.
EDIT: Today I had a time when the touch screen stopped responding to anything. I tried bringing up the navbar but was not successful, then I pulled out the S-Pen and was able to bring up the navbar and switch back to home screen without any issue.
Looks like the touchscreen part of this Samsung hardware is really flawed. This doesn't necessarily affect S-Pen as it's being processed differently from normal touches.
Additionally, I noticed that if I hover the S-Pen on the screen (the mouse pointer visible), touchscreen taps may not function correctly in some circumstances (despite they are registered, as the buttons tapped did respond). This seems to be more app-specific and not necessarily an issue with the hardware.
I have the same. New tablet, updated to android 11.
Today I had a time when the touch screen stopped responding to anything.
Ja pierdole....