Energy saving feature - Xperia Z2 Tablet Q&A, Help & Troubleshooting

Hi guys,
Recently, I was using this tablet to play a video under "Stamina mode" and all other energy saving features turned on in Settings/Power Management and discovered a phenomenon that I don't know previously.
A phenomenon was observed, the display shuts itself off at random times when and only when the device is being held up-side-down.
Turning off "Stamina mode" and this phenomenon does not reappear.
I can not think of any reason why this should occur and not when the device is held in any other orientation.
This tablet's screen can be turned on/off with a magnet in cover.
However, if the user decides to relax and use the tablet while up-side-down, I don't see the intelligent side of this in Stamina mode while device is held up-side-down.
Really, try it out on your tablet, this phenomenon is hysterical and quite annoying.
Do you use the tablet up-side-down?
And do you think this is a reasonable feature?

My device doesn't show this behavior.

yes i have noticed it i thought i was going mad.... but i have repeated it several times.. i quite often rest the tablet upside down under my nose to watch the tv then i flip it back up and the screens turned off.!! i thought i must have bumped the power switch or something, but I've repeated it several times now... very odd if is a feature. it's like flip to sleep or something...
i just had a thought maybe in stamina mode it turns this on.... flip to turn off or it's the eye ball tracking thingy when it can't see you looking at the screen it turns it off.....
just had a look in display settings its called smart back light control. but its not turned on.. so it's not that.
must just be the tilt sensor is enabled to turn the screen off when it's tilted flat on it's face..

coreo said:
yes i have noticed it i thought i was going mad.... but i have repeated it several times.. i quite often rest the tablet upside down under my nose to watch the tv then i flip it back up and the screens turned off.!! i thought i must have bumped the power switch or something, but I've repeated it several times now... very odd if is a feature. it's like flip to sleep or something...
i just had a thought maybe in stamina mode it turns this on.... flip to turn off or it's the eye ball tracking thingy when it can't see you looking at the screen it turns it off.....
just had a look in display settings its called smart back light control. but its not turned on.. so it's not that.
must just be the tilt sensor is enabled to turn the screen off when it's tilted flat on it's face..
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I have experimented with this several times. It depends on whether or not the device has moved or stationary.
Since, this only happens face down, so it is annoying.
So, it's like telling you not to lying on your back to watch a Firework show using Stamina mode for example.
If you lay the device face down on a table using Stamina mode it will turn off the screen shortly after obviously to save energy.
And if it is held up-side-down it turns off the screen randomly as it detects no motion. So, the user isn't likely to continuously shake the device while looking at the device up-side-down for any reason.

Related

[Q] How do I force the screen to stay on while charging on USB?

Running the newest UnNamed and I'm trying to find a way to keep the screen on while charging from USB. The point is to keep the screen on while driving. At night I charge with AC power so that's not an issue.
I found posts saying there was a burn in problem with SMOLED screens being on with a static image for more than a couple minutes at a time. I haven't seen it personally but if anyone has first hand experience with this phone or the international model, please speak up before I damage my phone.
Otherwise, once again, it looks like I need Tasker for the job. Have it detect bluetooth connection for the car and upon usb power trigger car mode and keep the screen on at ~50% brightness. something like that.
With unnamed go to Settings>Applications>Development and click Stay Awake.
Try this first,
Menu->settings->Applications ->Development -> Stay awak
If not working , try this
Menu->settings->Display->Screen Timeout ->Never
Now I've never seen permanent burn in on my SGSII or Nexus One (even while on constantly during a 10h drive to Vegas). I was using a stop watch app on my Nexus One, and while only on for 5 minutes or so, I did see it burn in, but it went away after a few minutes of being off (boy was I scared when I first saw it though).
Now, I have personally seen permanent burn-in on a Vibrant (not mine).
Funny thing is the screen timeout is set to like 5 seconds on it, so it's barely on. Yet I can clearly see the clock is burned into the screen.
Have you tried running a car app to hold a screen lock? I know Google Maps can do that. Plus it doesn't require going into settings (at least more than once).
EDIT: As a simple observation, the burn-in seems worse when it's white on a black background.

[Q] Proximity Sensor during phone call

During a phone call, my proximity sensor doesnt seem to be sensitive enough. The screen turns off when I hold it to my ear, but when I pull away to look at the screen and interact with it, the screen either doesnt turn on or it will flash on and off again repeatedly. It seems that the phone cant detect that it is not near my head any more and should turn the screen back on.
Generally it wouldnt be a big deal since the screen does turn off when its held near my head, but when I needed to use the dial pad for a menu prompt it got really frustrating when trying to press in numbers with the screen switching on and off. (I just called Verizon CS recently and navigating through the menu was a pain with this screen going on and off).
I'm coming from the Samsung Charge which was very responsive: when you pulled the phone away from your head, the screen instantly turns on for you to press in keys or hang up. With the Rezound, it doesnt turn on most of the time and I have to press the power button (which will turn it on and then automatically off again...). The problem is alleviated if I'm in a very bright place (direct sunlight) so my guess is that the proximity sensor may not be sensitive enough to detect the difference between darkness and low lighting conditions. I'm sitting in a room with a 26W CFL lamp (so not too dark) and the Rezound has trouble turning the screen back on during a call when I pull the phone away from my ear.
Was wondering if anyone else exhibit this condition or if its just specific to my device (in which case I'll have to give Verizon a ring to get another replacement)?
I'm having the opposite problem. It unlocks itself a lot up against my head. My thunderbolt did this so bad I got a replacement thinking it was a defective proximity sensor. But it wasn't and I got in the habit of manually locking the screen on calls. But now my rezound does it but not as bad. I think htc sucks with proximity sensors cuz auto brightness is never programmed properly. It doesn't go dark enough compared to Samsung and motorola phones with auto brightness on. It only has about 3 brightness levels like in the HTC brightness widget, whereas stock Android has 5.
Sent from my ADR6425LVW using XDA App
I'm having the same problem. The sensor would force the phone screen off as soon as I make a phone call. The verizon rep had me hard-reset while I was on the phone with her. The same symptom arises after the hard reset and the phone is brand-new.
I had to reset to get her to send me another rezound replacement.
On this replacement, however, I'm having the same issue again. My gf's rezound doesn't seem to have the issue.
I'm having a second replacement sent now. This is pretty annoying.
The interesting thing is the issue comes and goes. One day the sensor wouldn't respond, and other days it works fine. Although I would say that the issue deteriorates over time and never improves.

Smart Stay issues

Hey everyone,
I'm having issues with my screen not turning off at times and I think it has to do with Smart Stay. I'm not even looking at the screen and the screen would stay on. Last night I was playing around with my phone, I left the room, came back and my screen was still on. The other issue I have is when I'm reading a long email the screen would turn off. Is this a software issue or do I have a defective phone?
Forgot to mention, I have the Rogers version.
Wirelessgirl said:
Hey everyone,
I'm having issues with my screen not turning off at times and I think it has to do with Smart Stay. I'm not even looking at the screen and the screen would stay on. Last night I was playing around with my phone, I left the room, came back and my screen was still on. The other issue I have is when I'm reading a long email the screen would turn off. Is this a software issue or do I have a defective phone?
Forgot to mention, I have the Rogers version.
Click to expand...
Click to collapse
Your face has to be centered in the upper right hand camera. That is a little off centered. So turn your front facing camera on and center your face. That's where your face should be. It's not using your eyes but it's using facial recognition to stay on.
As for your screen not turning off... how long is your screen set out for?
Lastly, turn smart stay off and see if it does the same. That will let you know the real problem.
I have noticed this effect on my phone as well. Above my computer area, is a lamp, that is somewhat round. Every once and a while the smart stay will detect an object that it thinks is a head, however it is not. So the screen will stay on. Just move it. The smart stay does not work 100% in lower ambient light also. So if this screen off issue is occurring more often at night or in low light environments, that is fairly typical. Your phone is fine.
SlimJ87D said:
Your face has to be centered in the upper right hand camera. That is a little off centered. So turn your front facing camera on and center your face. That's where your face should be. It's not using your eyes but it's using facial recognition to stay on.
As for your screen not turning off... how long is your screen set out for?
Lastly, turn smart stay off and see if it does the same. That will let you know the real problem.
Click to expand...
Click to collapse
Ok, I turned on my front facing camera to center my face. I have to say that's an awkward way of holding the phone to make sure Smart Stay detects your eyes.
My screen is set to time out for 30 seconds.
I did turn off smart stay last night and my screen turned off. I know it's an issue with smart stay. But could it also be a front facing camera issue? It seems to take pictures okay though.
get out of the house now. You have a ghost.

Dont cover your sensors when turning screen on

So I figured I would post this up just in case people are going crazy about turning on their display, and then having it turn right back off on them lol. There are sensors at the top of the device by the ear speaker. When turning on the device make sure your fingers remain clear of those sensors for 1 second, if those sensors do not pick up light source by being blocked off (try it, press the power button while covering the sensors), the display will turn back off. Same thing goes for Knock on, the display wont even turn on at all. Keep your fingers clear of those sensors!
I dont think this is a design flaw I think LG inadvertently did this to keep from the device from turning on in your pocket by accidentally hitting power on knocking on while in your pocket. it might also attribute to poor knock on feature in low light areas or night time.
Walter21026 said:
So I figured I would post this up just in case people are going crazy about turning on their display, and then having it turn right back off on them lol. There are sensors at the top of the device by the ear speaker. When turning on the device make sure your fingers remain clear of those sensors for 1 second, if those sensors do not pick up light source by being blocked off (try it, press the power button while covering the sensors), the display will turn back off. Same thing goes for Knock on, the display wont even turn on at all. Keep your fingers clear of those sensors!
I dont think this is a design flaw I think LG inadvertently did this to keep from the device from turning on in your pocket by accidentally hitting power on knocking on while in your pocket. it might also attribute to poor knock on feature in low light areas or night time.
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There's also a bug which emulates the same symptoms,while the sensor is not blocked. Changing the screen-off effect to different effect, is a work around for those caught with the issue.
timsterzzz said:
There's also a bug which emulates the same symptoms,while the sensor is not blocked. Changing the screen-off effect to different effect, is a work around for those caught with the issue.
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Click to collapse
Its interesting that LG went with this sensor design. This sensor thing is kinda weird seeing as people will no doubt block this sensor and trigger this effect without even realizing what they are doing, making people think their device is broken. LOL im sure this is talked about in the instruction guide but who the heck reads those things now?

Display turning OFF after a while, probably after Lollipop..

I have an LG G Watch with 5.0.1 since a few days and I tried and sent back an identical LG G watch on 4.4W.1 a while ago and didn't experience it. Basically, I am noticing that after leaving the watch alone lying somewhere (I don't wear it at home) for some time (can't really say how long but at least an hour, I think) the display turns OFF. A single tap and it wakes up and then works "normally" until the next time...
The other G Watch with the older Wear version didn't have this behaviour so is this a feature of the latest Wear version (or possibly an LG-exclusive mod to squeeze even more battery life) or is it maybe an "issue"..?
I am saying this especially because I installed the Slumber app to automatically turn the display OFF while charging but realized that it's easier and more elegantly done by simply choosing the new "Theater mode" in Android Wear 5.0.1 and uninstalled the app. I don't know if what I am seeing is due to having installed Slumber but I really don't think so.
Does anybody know for sure what it is and how it exactly works..?
TIA
I was just about to post about this I think it's a bug though... I don't use a Slumber app or anything, I want my screen truly to be always on. But it will turn off occasionally and I don't like that!! I definitely did not have this issue on 4.4W.2
Anyone know what the problem is or how to fix it?
philessthanthree said:
I think it's a bug though... I don't use a Slumber app or anything,
Click to expand...
Click to collapse
Just to be clear, I don't use it anymore and uninstalled it just after getting the 5.0.1 update with its Theater mode. My worry was that having had it installed triggered this behaviour but since you get it without ever installing it I can put that to rest.
I want my screen truly to be always on. But it will turn off occasionally and I don't like that!! I definitely did not have this issue on 4.4W.2
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Click to collapse
Have you ever got it while it is on your wrist..?
Reading this I just removed my g-watch and after a few minutes I see that my screen was OFF. Never happen when I have watch on my wrist the last 2 days. Screen alaways ON and turn on with movement OFF. So yes it is a new feature of the last update 5.01.
Same here, it happened twice on the table, and once on my wrist this morning.
Must be something like the ambient mode in Moto 360 that does this. For one moment I thought I accidentally triggered the cinema mode.
I always take my watch off at work and the screen keeps turning off after 30 minutes. I did a full reset in case it was an overhang from the old version but it's still turning off.
So based on all of the above replies it seems it's a feature of the latest Android Wear. I am not calling it a bug because, except for a single reported case from our friend with the Moto 360, it seems to never happen while wearing it, so the logic appears to be "save the battery when not in use".
Just to "investigate" it some more, I am trying to time it and confirm it's 30 minutes for me too like StuBFrost says, and may you all please confirm you have Ambient turned ON (i.e. the display is always ON) and state whether you have the new Tilt to wake up setting ON (i.e. the Display lights up from its dimmed state when you tilt your wrist).
My settings are Display always ON and Tilt to wake up OFF.
It would be good to have some more reports from owners of different Wear smartwatches, to this end I posted also in the general Android Wear forum but no replies so far. I am going to update that post with our findings and see if we can understand what exactly is this behaviour we are seeing...
Actually, I think it might be a good feature to keep ON in many cases but it absolutely should be an *option*!
I have both options switched on and both work fine except for this new stupid sleep mode that quite clearly hasn't been thought out properly. Surely the theatre mode allows people to turn the display off should they need to and for everythimg else it should do what it did before and stay on.. If it doesn't get "corrected" soon, I will be rooting my watch and putting a custom ROM on it.
StuBFrost said:
I have both options switched on and both work fine except for this new stupid sleep mode that quite clearly hasn't been thought out properly. Surely the theatre mode allows people to turn the display off should they need to and for everythimg else it should do what it did before and stay on.. If it doesn't get "corrected" soon, I will be rooting my watch and putting a custom ROM on it.
Click to expand...
Click to collapse
Trying to time it, I think I can say (I am still trying to cover all of the different scenarios) that any event which normally wakes the display up to normal brightness (i.e. an incoming call) resets the countdown. BTW, I think you are right and it's 30 minutes off the wirst with no movement, no tapping on it and no event like the ones just mentioned. "Normal" incoming notifications don't seem to reset the countdown.
Like I said, I don't think it's a bad idea in and of itself (I would use it in most cases) but they should have made it an option! And, ideally, they would let us set the time after which the display turns itself off.
I use and *strongly* prefer Android instead of limited and dumbed down Windows Phone and even worse Apple's useless crap exactly because of its customizability and powerfulness...
"Funny" thing is that from further testing, this feature doesn't kick in while on the charger (which could actually be pretty useful for most people...) LOL
ADDENDUM: the kind of events which resets the countdown to this "deep sleep" state (i.e. an incoming call) also wakes the display up from "deep sleep".
I am running the LG G Watch, version 5.0.1 with accompanying Android Wear app on my phone version 1.0.5
Screen is set to ALWAYS ON.
Tilt to wake is OFF.
It happens BOTH on my wrist and off my wrist. The timing is variable from my limited observation, but I haven't tried to directly time it.
on my lg g watch too
may I ask something related? on mine, it happened to be able to stop display (full black) with a swype from bottom to the top, never been able to do it again. Anybody faced that?

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