Xperia c6806 lag - Sony Xperia Z Ultra

I am experiencing a big enough lag on my phone that I bought last week used from someone. It had 4.4.4 when I bought it and the phone would lag alot so did a factory reset and stiil the same, I did the 5.0.2 update with pc compagnion, everything went good but tha lag is still present. If I turn off the phone and turn it back on its all good for about 3 to 5 minutes and then again the lag comes back.
The only way I can get rid of the lag is with rom toolbox, cpu control, I set governor to performance then the lag is gone but I find the battery drains quicker when set to performance, and dont want toake the cpu run too hard either.
Could my phone has a hardware problem. Please help me

Have you tried to restore via PC companion or flashtool? Maybe that would solve it

teddy74eva said:
Have you tried to restore via PC companion or flashtool? Maybe that would solve it
Click to expand...
Click to collapse
I did install 5.0.2 with pc companion and the lag is still present but i can try to restore with pc companion and hope it will do the trick because I really like this phone. Thanks for the tip

Tried restore and the lag is still present. I dont know what else to do, probably a hardware problem since the lag is in 4.3, 4.4.4, 5.0.2. The owner who had it before me changed the screen on it maybe it could be related but dont know what else to do. Any advice would be really appreciated.

Could you describe the lag a bit more. I've been seeing a longer and longer lag on my C6806 but I thought it was due to the number of apps I have installed.
I did have the screen replaced by a Sony repair center contractor in Canada. I was not impressed by their service. They took 2 months to fix my phone! The new screen isn't completely flat and they put a scratch on the back panel from the back side.
I can see the lag getting worse as I use the phone continuously and it warms up. You can feel the back top centerish area getting hot as it's going. Sometimes it will reset when it gets too hot.
I wonder if they didn't add thermal paste to the processor or something when it was being repaired.

Related

[Q] Random Reboots?

Have you guys ever experienced your x10 randomly restarting itself? Sometimes when I'm talking on the phone or just have my phone lying on my bed, it just restarts itself. I doesn't bother me too much since it isn't that frequent, but it pisses me off when it does restarts while I am on the phone...
Does anyone know why it does this and how it can be prevented?
Hi shukla,
I've got exactly the same problem! Which firmware is on your phone? I've got the 026 on my X10i. I think it's the firmware or the new root method?!
If I'll find some time this week I would like to try some things out...Some other experienced that problems, too?
Regards,
Martin
I've had random reboots as well running 26 firmware (using the 3 step root method) thankfully never during a call last time was while in Toronto this past Saturday taking pictures with Vignette.
I'm on 024 (rooted).
I think I was wrong with my thoughts. Today I've read a lot about our problem with rebooting. Seems it is the Sony backup application. It is randomly accessing the SIM card and thats the reason why our phones crashes. Right now I am going to flash my phone again. I'll tell you some more details after flashing is done.
Ok, well it's not easy to fix that problem. Yesterday I flashed my X10 about 6 times. With original SEUS firmware and the problem still appears. Then I flashed with 026 debranded firmware. After that I rooted my phone with the doshaska.net method. After that I removed the restore/backup app from /system/app. The problem still appears till now - but not so often. In fact, I had reboots every minute, so my phone didn't came up. I really don't have a clue why it happen. Someone else got an idea?
Regards ,
Martin
The only way I could stop mine from rebooting was to remove SetCPU. Are you using it? If so, feeze it or remove it and see how it goes. I do have another problem now with the damn screen not sleeping unless i push the power button! Oh well, the joy of fiddling
Nothing out of the usual battery dain yet. I am running the branded Dutch t- mobile firmware. I'm going to root it soon.
Sent from my X10i using XDA App
need help please
glad i found this thread
i got the same problem since yesterday, my phone just restarts or turns off during call or anytime even if the screen is off and its just lying on my bed..
and doesnt starts on pressing start button, though i do feel vibration...the only way to start is to remove battery for few seconds and then put it again
infact i am using my phone without back cover as everytime i have to remove battery
tried 24 firmware and 26 with rooting method...same problem now trying to update from SEUS...lets c how it goes,,,fingers crossed
anybody else had this problem..? if cleared please advise me wot 2 do
i was using setcpu, juice defender and was rooted by .app method, what i think this problem started after uploading Dark Luster theme
but everything gets formatted when u reflash isn't it..?
please help
thanks
gitin said:
glad i found this thread
i got the same problem since yesterday, my phone just restarts or turns off during call or anytime even if the screen is off and its just lying on my bed..
and doesnt starts on pressing start button, though i do feel vibration...the only way to start is to remove battery for few seconds and then put it again
infact i am using my phone without back cover as everytime i have to remove battery
tried 24 firmware and 26 with rooting method...same problem now trying to update from SEUS...lets c how it goes,,,fingers crossed
anybody else had this problem..? if cleared please advise me wot 2 do
i was using setcpu, juice defender and was rooted by .app method, what i think this problem started after uploading Dark Luster theme
but everything gets formatted when u reflash isn't it..?
please help
thanks
Click to expand...
Click to collapse
alright i found the solution myself...this post is just to help others
flashing did not solve my problem at all, through SEUS or rooting method nope the problem didn't go
finally i removed my memory card and everything was fine
some things on memory card could cause reboot during calls or randomly, next time try formatting your memory card
hope it help someone
cheers!
luv my x10 though i ve also got iphone but i ve never looked back
Just curious, how hot is everyone's phone when it reboots? I've noticed my x10 doing the same when its running a little warm. It usually starts acting up when it's over 105 degrees Fahrenheit.
Sent from my HTC Desire using Tapatalk
Gitin thx..it looks much better now, however yeasterday I was carrying my x10(still with no memory card in it) in the pocket, it got pretty hot (most probably over 38 degrees) and it turned into this rebooting "mode"..finally I left battery for 20 minutes in cold place..x10 got back to normal..I think that random reboots are the matter of memory card issue (You have solved this problem) or/and overheating of battery - still couldnt find any clue how to ease this pain but read somewhere that Froyo for x10 will have this problem taken care of..
i think ( depends on my experiences) the telephone need to reboot coz one applications from SD card want to launch (send or receive) some commands from or to internal (built in memory).
that's means this applications needs to move temporary to internal memory just to execute this command so absolutely android system will restart to create virtual memory to this application to let it runs correctly
first it's better to remove backup/restore programs or make its runs manually, if you have another software need to save data to SD memory ,remove it.
it's better to launch applications directly from internal memory to win the time and performance but At the expense of the memory size
ps: all that explanations depend on the framework version.
sorry for complex explain but i don't have easy way to explain this problems
i suddenly have it now to, first every hour, now every 5 minutes, my phone won't start up anymore
sorry..bad news..its pretty cold here in Poland so battery shouldnt turn to hot that easily but apparently the problem is more serious..I have to admit that random reboots occur less frequently than before but that **** still hapens to my x10..after no more than 2 days I had gotten memory card removed it got back to malfunctioning again..
it really pisses me off that I cant enjoy this phone anymore..
android 2.1 or higher is my only hope..
if anybody solved that issue entirely..please, dont be shy, do not hesitate..help us, please!
zbyslove said:
sorry..bad news..its pretty cold here in Poland so battery shouldnt turn to hot that easily but apparently the problem is more serious..I have to admit that random reboots occur less frequently than before but that **** still hapens to my x10..after no more than 2 days I had gotten memory card removed it got back to malfunctioning again..
it really pisses me off that I cant enjoy this phone anymore..
android 2.1 or higher is my only hope..
if anybody solved that issue entirely..please, dont be shy, do not hesitate..help us, please!
Click to expand...
Click to collapse
i too am hanging on for the 2.1 update to hope it solves the problem. I've a feeling there's going to be a lot of x10s going into SE for a service though when it is released and doesn't solve the problem!
I'm not 100% but is this problem the entire phone powering down, or just the connection to your network, mine just loses its network connection and then connects again, over and over ........
there's nothing 2.1 update will do
as our phone was working fine when v bought it, its completely a hardware fault
ok do this...
1.take out sim
2.format ur memory card
3.repair through SEUS or root process watever..
4.turn on ur x10 without sim and leaving formatted card inside
it will still give u hard time u can try putting some video on ur memory card and try to play it few times, ur x10 will turn off and wont turn on until u take out battery for few seconds or take ur x10 in front of Air-Conditioner
as someone suggested in rooting thread to keep ur x10 in front of air-conditioner if u get errors while rooting or if rooting process stucks in middle
the same thing applies in our case...try using ur phone in front of A-Con it wont turn off
i tried with a new battery ...still the same
as i ve been repairing mobile phone from last 5 years, i opened my x10, took out the motherboard, took out all plates over IC's, cpu and cleaned it with acetone properly and heated cpu and whole board with Hot Air Gun...everybody who repairs mobile phones knows what i am talking about
still its the same....
still i am not saying i know everything, anybody knows what the problem is and suggest the overcome is most welcome
nxt few months gonna b really cold at my place...i definitely think i'll notice a difference as its really hot these days which is causing my x10 to die
I did experience this when I debranded my AT&T X10. I have since gone back to the AT&T ROM and have not had this issue since. My battery life has also improved. I did root and remove all the AT&T bloatware. I also edited settings.db to allow for installing non-market apps. This phone is very fast and smooth now with almost no glitches at all.
mine won't even work anymore..once per every 20 or 30 times and than it turns off itself very quick..I can't recharge battery, nothing..really hope that 2.1 will help somehow..I am thinking of getting back to very first soft that x10 was launched with..seriously I am sickin tired with that ****..
naplesbill said:
I did experience this when I debranded my AT&T X10. I have since gone back to the AT&T ROM and have not had this issue since. My battery life has also improved. I did root and remove all the AT&T bloatware. I also edited settings.db to allow for installing non-market apps. This phone is very fast and smooth now with almost no glitches at all.
Click to expand...
Click to collapse
Hi, I have an AT&T X10 and wonder what you debranded your phone to? I debranded mine about a week after I got it to R2BA026 Latin America and never had any issue with rebooting.
Aside from needing to power off the phone to check for software updates (two weeks ago of course ) my phone has been up for +358 hours without an issue, and that's with installing the AmbientTime home screen several days ago.

Does Downgrading back to 1.6 or changing the battery solve the overheats and restarts

Not gunna go into much detail here. I'm sure most people have heard o the motherboard bug which causes the sony ericsson to over heat and reboot as soon as it is turned on and things like that. This problem only started for me when I updated to 2.1. Would downgrading to 1.6therefore stop the reboots because I never got even 1 before. Would changin the battery to a diferent one stop overheating o the battery. Maybe there is a battery specialized or this. Maybe a mugen battery would work? Help greatly appreciated. thanks in advance
I dont think so, i had the same problem and tried everything, last thing was getting the new one, and now i can do anything, and no reboot, i think u should go to SonyEricson and tell them about your problem, they will give you back your phone for about 3 times, then when your problem still persist they will give you a new device or they will change motherboard,
Good Luck (and sorry for bad english ^_^)
Out of Warranty Cant be bothered to explain why. Getting it repaired would cost a lot. CoulD I repair it myself?
your best bet it to use advanced task killer app
sent from my X10 using my wicked awesome premium xda app
I do use that app but 90 percent of the time I cant get my phone on long enough to even think about using it
have you tried reflashing the rom, via repair option on SEUS, or even Flashing a custom rom?
sent from my X10 using my wicked awesome premium xda app
yep didnt work
has anyone tried the downgrading or battery change method that can enlighten me as to wheether it will work or not. Or at least significantly reduce the reboots so I can actually use the phone
markboi13 said:
Not gunna go into much detail here. I'm sure most people have heard o the motherboard bug which causes the sony ericsson to over heat and reboot as soon as it is turned on and things like that. This problem only started for me when I updated to 2.1. Would downgrading to 1.6therefore stop the reboots because I never got even 1 before. Would changin the battery to a diferent one stop overheating o the battery. Maybe there is a battery specialized or this. Maybe a mugen battery would work? Help greatly appreciated. thanks in advance
Click to expand...
Click to collapse
Yes i think some thing inside the rom could help. One of my friend have X10 with mainboard bug like u. But as i sure in xrecovery it never reboot even you flash a rom sooooo....it should be something inside the room or kernel
sorry i dont really understand what you want me to do :S ????
just downgraded to 1.6. Still rebooting but not as much. Not every minute anymore. It like every few minutes. Im at a loss here there must be something I can do. Warranty and paying to change the motherboard is not an option
I had the same problem, tried everything but my phone only worked when I was using it in cold places, or in front of a fan. The problem started to become worse gradually, it started playing games, then in a few minutes of light use... and then every minute. Had to flash to stock rom in front of a fan to use the warranty.
You cannot do much, unless you use the warranty you'll stand with a dead phone for now.
Isnt there a way I could like open up my phone and do something to it to make it work? There must be something out there that will work.
what if i put the phone and battery in the freezer for a day or a few. maybe it could at least stop the overheating for at leastt a few days? i wouldnt mind doing this every few days
markboi13 said:
what if i put the phone and battery in the freezer for a day or a few. maybe it could at least stop the overheating for at leastt a few days? i wouldnt mind doing this every few days
Click to expand...
Click to collapse
It will work for a few minutes, once your start to use the phone, the battery will start to heat, and then it will reboot once it reach its threeshold.
I highly suggest you to try to repair it in any sony center, or at least check the price to fix it. As far as I know, you can't do anything to at least remedy it. You won't be able to use your phone well. I experienced it and tried everything it came to my mind to at least use the phone well for a few days before I gave up and sent it to the repair center.
Out of warranty and would be like 100 quid to get motherboard replaced. (sorry about caps lock) there must be something that no one has thought of
Of there is of course a problem with asking for solutions that no one has thought of....
Sorry for the cheap shot. I do have sympathy as I have the same issue, although to a much lesser extent. Got a new battery and it made no difference. Went into a phone shop today and had a chat. Although I was not 100% convinced about the guy in there he showed me another X10 that smelled the same as mine and he said it did reboot. Anyway for £15 he says he can reflash the stock ROM using a special box. He seemed convinced it was software related so I may give it a go. It is very strange that I can put the phone into xRecovery when the phone is rebooting and it is stable.
However I think your best bet is to sell your phone and get another. Not sure how much a spares/repairs X10 goes for but I can recommend the ZTE Blade as a good, cheap Android phone with a strong support over a MoDaCo. If you do this you should not be to much out of pocket.
dont really want a different phone. Lilke I said there must be something that someone knows :S
if theres no solution anyone knows, does anyone know where I can buy an xperia 10 PCB so I can dissassemble my phone and change the PCBs myself
Get insurance and lose the phone.

[Q] Restarts.

I have bought xps about 20 days ago. Yesterday and today , while I was surfing the net via wifi (both times) , my phone suddenly switched off and made a restart. Did anyone experience a problem like this ?? It never happened before.
Not had that problem - infact I was just thinking today that I haven't restarted my phone for a week.. and it still feels super smooth... which I've never experienced before on Android!
Never had a sudden restart, lag or unresponsive device. Seems that you are the only one here with such a luck...
Is this a reason for returning my phone to Sony? Is sony obliged to replace my device with another one?
georgebest said:
Is this a reason for returning my phone to Sony? Is sony obliged to replace my device with another one?
Click to expand...
Click to collapse
Unfortunately sudden restarts are very common in the android world. I think 80% of the android smartphones had at least once this problem. You should wait to see if it happen again and if so try a hard reset or a software repair using sony pc companion. If it will become a common problem even with other users sony with a future update it will fix the problem. What software version do you have .62 .67 or .73 ?
Hi,
If you have this reboot issue
Nothing can resolve this!
But,just in case
Do not use your phone with charger pluged in for long time!
This kill your battery very quick!
And cause autoreboot
And be careful with internet!
If you flash some FW or rom or kernel
Made a full charge before flash
Ciao
I've had this happen to me on my Xperia S twice already while using it.
It also randomly restarts while in standby once in awhile.
Not sure what's causing this. Any suggestions?
ssj_jaypee said:
I've had this happen to me on my Xperia S twice already while using it.
It also randomly restarts while in standby once in awhile.
Not sure what's causing this. Any suggestions?
Click to expand...
Click to collapse
If it's not happening very offen like twice a day, the only thing you can do is wait for the 4.0 update, because If you look in all the other android smartphone forums you will see that every android model have this issue from time to time. I think is something like the Windows OS bluescreen...very very difficult for normal users to detect where is the problem. I think with the 4.0 update the problem it will be solved. But if the Xperia S become unstable and randomly rebooting every day try a software repair with pc companion and if this is not solving the problem just go to a Sony support center and give them the smartphone for replacement.
I have the reboot twice
Refresh ROM good!
Hi, my phone also has random restarts. It becomes sluggish and unresponsive, then just restarts.
I think mine has done it once or twice when just in standby mode as well.
I actually got my first Xperia S replaced as it had this problem, but the replacement is also suffering from it.
Seen a few other people saying they have the same over on the Sony forums, so I think its a software problem somewhere.
sssache said:
Unfortunately sudden restarts are very common in the android world. I think 80% of the android smartphones had at least once this problem. You should wait to see if it happen again and if so try a hard reset or a software repair using sony pc companion. If it will become a common problem even with other users sony with a future update it will fix the problem. What software version do you have .62 .67 or .73 ?
Click to expand...
Click to collapse
I have .73. I didn't flash my device nor I use it when charges(and I don't let it charging for hours).
I think that there was not enough RAM at that time but I am not sure. I'll have to check it out.
I just experienced the same problem not too long ago. I was web browsing and my phone crashed and rebooted on it's own. I'm on the phone with Sony right now because I have the youtube issue as well. This sounds like a software issue.
Had mine since March 6. So far only one random reboot, none since update to 6.0.A.5.6
Sent from my SO-02D using xda premium
I called Sony Mobile Canada to report this issue. I told her others are having this issue as well. She's going to escalate it. I would like to encourage everyone who's having this problem to call Sony tech support in your Country and let them be aware of this issue. The more people call about this issue, just maybe they will work on a software fix sooner rather than later. Strength in numbers!
No restart on mine
I heavy use internet 3G/wifi on it
But,
I never flash anything on mine with flashtool or seus or pcc
Pure stock FW.67
12w14
AAD-AV
Only 2 "big" issue
Phone freeze one time
when plug charger in
VolumeUp+power solve the bug,
And the yellow tint on the screen.
Normally,when the phone keep autoreboot,or autopowerOff
It is caused by a dead battery
You can identify it
by keep hold power when the phone restart by itself
and at reboot
If the led blink 3 time red when holding power
That's indicated battery die
Or made a battery test in service *#*#7378423#*#*
But your phone is new !
So try a full charge with reset battery to get best power (volumeUp + power 5second one vibrate)
If your phone is rooted
you can delete manualy "power_supply"
in sys/class and reboot
with charger pluged in
After that,
try a full restore with seus with wipe data ect..
Can't help more :-(
Ciao
kaosdroid said:
Hi,
If you have this reboot issue
Nothing can resolve this!
But,just in case
Do not use your phone with charger pluged in for long time!
This kill your battery very quick!
And cause autoreboot
And be careful with internet!
If you flash some FW or rom or kernel
Made a full charge before flash
Ciao
Click to expand...
Click to collapse
Most bull **** reaction today...
Whats next?
Putting phone in fridge when charging?
Sent from my LT26i using XDA
Efe64 said:
Most bull **** reaction today...
Whats next?
Putting phone in fridge when charging?
Sent from my LT26i using XDA
Click to expand...
Click to collapse
I don't think so
Just read the forum
maybe you understand
I said that
because with my old x10
I encounter some restart and finally
Kill my battery
And nothing resolve this reboot on it!
I used the phone alway pluged and it come hot like *****!
And some people and dev said
MADE A FULL CHARGE BEFORE FLASH
This mean to avoid battery problem
But you!
What you suggest?
I just try to help or give some tips
And finally read the manual of your phone!
Especially battery section!
which browser you was using? and did that happen while downloading or just while browsing? and for how long you already was connected to wifi before the restart?
Eyados said:
which browser you was using? and did that happen while downloading or just while browsing? and for how long you already was connected to wifi before the restart?
Click to expand...
Click to collapse
I was using opera mobile and I was surfing about 5-10 min.
kaosdroid said:
I don't think so
Just read the forum
maybe you understand
I said that
because with my old x10
I encounter some restart and finally
Kill my battery
And nothing resolve this reboot on it!
I used the phone alway pluged and it come hot like *****!
And some people and dev said
MADE A FULL CHARGE BEFORE FLASH
This mean to avoid battery problem
But you!
What you suggest?
I just try to help or give some tips
And finally read the manual of your phone!
Especially battery section!
Click to expand...
Click to collapse
Sure i understand it much better then u.
What has random freeze to do with battery?
What you are telling is another section:
http://forum.xda-developers.com/showthread.php?p=25402228
Here you go.
Of course it getting hot.
Power means heat...
Logic.
This isnt a overclocked pc with grammacs core mg..
Kills battery and reboot. Right. Your right.
You go from a to z.
Do you even know what you are talking about?
He says freeze with browser bla bla, you begin with battery...
Nvm.
Good luck in your life
Sent from my LT26i using XDA

[Q] Xperia Ultra increasingly slow/ unresponsive screen

To keep things simple, I had a cracked screen on the Ultra which was replaced last week. However now the phone screen is slow and unresponsive after about a minute of use (fast & like new after right turning on however).
Ive tried the mod tweak found here http://forum.xda-developers.com/showthread.php?t=2522657
As well as the thermal screen calibration here http://forum.xda-developers.com/showthread.php?t=2470070
There is no change with either mode. Cleaning with alcohol only works for a few minutes, and yes Ive removed the ASF for no change.
It should be noted that when booted at first minute or two, the touch inferface is quick and brilliant. After a minute or so it gets slower and remains so. Typing a text is a gruelling affair at that point,
Ran 4.3 android and updated to 4.4.4 and also no change in performance.
Does anyone have any ideas/ tips or pointers?
HELP!?!
An app with a memory leak?
Looks quite normal. RAM 1.1GB used; 600MB free.
Unless thats not what were talking about?
EDIT: might be up to something. using advanced kill on Go taskmanager EX and its seemed to do improve the situation in the short term. Will keep testing
Well got about that far thus far. The advanced kill works sometimes, but none of the apps look out of whack (from my basic knowledge anyhow)
Any help/ links in diagnosing a memory leak would be very appreciated.
Don't suppose you've got the Google now launcher? I had to uninstall as they introduced a memory leak in the last update.
Un updated it just in case.
Its tough as even watchdog lite isint detecting much. com.google.android.gms:snet at startup took 22% CPu but otherwise its steady.
Grr jezz I even did a factory reset to 4.4.4 and its still there. Would trying a custom rom help?
Well as an update manage to completely wipe and reinstall the OS. No change in performance however
Does anyone know if a faulty screen install could be to blame for this?
icehawk223 said:
Well as an update manage to completely wipe and reinstall the OS. No change in performance however
Does anyone know if a faulty screen install could be to blame for this?
Click to expand...
Click to collapse
Could well be, but i find it strange that it acts normal again after a reboot? That alone indicates that it's something wrong with the software. I still hold a finger on a process gone wild. Do you have Recovery installed? If yes, re-flash the ROM or flash something else and see if that solves it. I would personally flash a stock ROM and flash it with Flashtool so you don't have to root or void any warranties, and it'll be the simplest thing to do in case the screen is still acting weird after flash, and you want to get it checked out again (since it most certainly will be a hardware issue at that point).
So, fire up Flashtool, download a complete stock ROM (TFT), flash it, test it. Is it working fine now? Sweet. Keep using the ROM. Is it still the same thing? Contact the repair center again and tell them what's up and please do tell them that you've already done a factory reset, since that's the first thing they'll do themselves. Do not tell them about Flashtool or any other hacks or tweaks. They'll probably blame you if they think that you're an XDA user. "Oh, so you've been playing with it, and you bricked it and wanna fix it for free, bla bla".
Ask if they can open the device again and check that everything is fine and that you haven't received a faulty panel.
Ive actually did a complete tft flash of the original xperia ultra software. No change whatsoever vs previous state.
Im increasingly suspecting a hardware issue. Could it be a poorly plugged in cable? Its random chugging/ smooth response is completely confusing...
icehawk223 said:
Ive actually did a complete tft flash of the original xperia ultra software. No change whatsoever vs previous state.
Im increasingly suspecting a hardware issue. Could it be a poorly plugged in cable? Its random chugging/ smooth response is completely confusing...
Click to expand...
Click to collapse
Did you flash the exact same FTF that you've always used, or did you flash one from a different region? I would try the GPe ROM if i were you, just to be sure, but don't bother doing it if you're not rooted and ready to flash. Yes it can easily be a hardware issue, and you should probably contact Sony or your nearest service center.
As an update I tried installing a fresh tft flash of a different build but same issue.
Notably noticed that the notification light on the screen is not working at all, so currently looks like a hardware issue. Will keep updated for reference & visit a repair centre

Update made screen unresponsive.

Hi,
My Z4 just asked to update the ROM, and afterwards, the screen has areas that are no longer touch sensitive.
Is anyone else experiencing this issue?
Thanks for any ideas!
Jim
Have you tried rebooting, then opening the Diagnostics app and running the touch screen test? If there are still dead spots showing in the test, you might want to flag it to Sony support.
I'm not certain if it's a software or hardware issue, but I have found both pre and post-update, that the touchscreen occasionally becomes less responsive, to the point that trying to use a drag gesture doesn't work without the touch dropping out. This happens every couple of days, and I suspect it's to do with throttling as it coincides with very sluggish performance. Seems to resolve itself when left for a few minutes, or a reboot.
Yes! I thought it was just me. I have a tempered glass screen protector and removed it to confirm whether it was causing the issues. Also ran the diagnostics which ran just fine.
It seems to be perfectly fine after a reboot and then the longer you go the worse it gets.
Hoping that this is fixed in the 5.1.1 update whenever that happens.
The conditions that this occurs does seem extremely sporadic. After playing Star Wars Uprising for ~45 minutes yesterday morning, the touch screen failed to recognise any swipes or taps, to the point I had to force a restart with the power button to exit the game. After leaving the Z4 for 15 minutes, no issues at all.
Last night I managed to play the same game for over 90 minutes, and today for another 90 minutes with no problems at all.
I'm starting to think that it could be performance throttling, alternatively I have noticed the screen getting particularly warm above where the SOC sits. Could this temperature be affecting the screen sensitivity? Using CPU-Z I have found some of the sensors reporting around 70C, battery around 35C, though this is after running intensive games. I'm unsure if the upper temperature is normal for this type of chip or not.
Sent from my SGP771 using Tapatalk
I have the very same problem:
Tempered glass from IVSO and the original case from Sony.
Since the update the touchscreen is VERY unresponsive.
I removed the case (!) and it got better (seriously, WTF?).
Does it mean to remove the tempered glass will solve the problem?
But it was fine before upgrade to 251. Sony sucks...
我從使用 Tapatalk 的 SGP771 發送
I reset to factory settings, and that may have cleared it up... but I'm not positive.
I'll update this thread when I play with it some more.
Did anyone have success with removing the screen protector?
OK - I can confirm that a factory reset after the upgrade does not solve the problem. My tablet cannot pass the touch screen diagnostic.
2xmanman said:
Does it mean to remove the tempered glass will solve the problem?
But it was fine before upgrade to 251. Sony sucks...
我從使用 Tapatalk 的 SGP771 發送
Click to expand...
Click to collapse
I removed the case, not the screen protector.
But some issues are left, so i hope for the next FW-Update...
An update:
I reached out to Sony's support group. They suggested downloading the PC companion app and having it reflash the .251. This does a factory reset.
This made the touchscreen response significantly worse.
My next step is to see if they will let me downgrade to the previous release, because the tablet was working flawlessly on that release.
Sony support says you can't downgrade to the previous rom. I found flashtool, but can't find the old rom to flash onto the tablet. Still looking...
Noticed the same thing after the update.. Hoping for a fix soon as it was flawless before the update.
Now simply browsing is annoying because it either misses swipes or registers them as longer swipes, causing the page I'm trying to read to scroll down super fast as if I flicked it when I actually scrolled slowly. :crying:
There is no update coming. Sony does not acknowledge that the problem exists.
Need more people to post on Sony offical forum, tell them this problem.
I'm hoping the .253 version helps this problem. It doesn't appear to be available for anyone yet.
jbresee said:
Sony support says you can't downgrade to the previous rom. I found flashtool, but can't find the old rom to flash onto the tablet. Still looking...
Click to expand...
Click to collapse
Here is a complete tutorial about flashing any firmware on your Z4 tablet, even downgrade to an older one.
http://www.xperiablog.net/2015/03/1...peria-lollipop-using-xperifirm-and-flashtool/
I flashed Nordic version of 28.0.A.7.24 firmware and my touchscreen sensitivity is back to normal
If you have any questions about the flashing procedure feel free to ask.
I had this exact problem after updating to 224. Ran the Sony Pc companion program on my windows pc and did a full software restore on my z4. problem solved.
laggist said:
I had this exact problem after updating to 224. Ran the Sony Pc companion program on my windows pc and did a full software restore on my z4. problem solved.
Click to expand...
Click to collapse
I'm not sure whether is it because of root or Xposed, but after doing a factory reset, the touchscreen seems a bit more responsive. It is after rooting or installing xposed that the problem comes back up.
riveria said:
I'm not sure whether is it because of root or Xposed, but after doing a factory reset, the touchscreen seems a bit more responsive. It is after rooting or installing xposed that the problem comes back up.
Click to expand...
Click to collapse
Ah, I also have intermittent touch problems. Until now I kept thinking it's because my finger is too cold or something, but I have it since upgrading to .224 also. Rooted and running Xposed v.85.1.
jelbo said:
Ah, I also have intermittent touch problems. Until now I kept thinking it's because my finger is too cold or something, but I have it since upgrading to .224 also. Rooted and running Xposed v.85.1.
Click to expand...
Click to collapse
Yea, I kinda think it's either because of root or Xposed that's interfering with the touch sensors. But I'm kinda leaning onto to Xposed that's causing the problem.

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