Develop Bugs

[Q] Flaky Touchscreen

I have a 2013 Nexus 7 which had been having touchscreen issues. Occasionally I'll try to unlock it and find that I can't draw a pattern at all, nor do any of the options in the power menu respond to taps. A hard reboot usually fixes it, but lately it's been taking two reboots, or one and a long time waiting with it off, or occasionally a strong rap on the back of the screen.
The actual LCD works fine. Also, when the touchscreen is not working, it is also broken in TWRP.
It's running Omnirom 4.4.4 now, and was also happening when I was using Paranoid Android.
Any ideas?

Z1 Compact with Cyanogenmod - Screen doesn't wake

Hi,
I have:
Sony Xperia Z1 Compact
Rooted
CyanogenMod version 11-20141112-SNAPSHOT-M12-amami
Android version 4.4.4
Kernel version 3.4.0cyanogenmod-g1b20e398 [email protected] #1
Build number cm_amami-userdebug 4.4.4 KTU84Q a265284510 test-keys
My phone's screen has the annoying problem of sometimes not waking when I press the power button (while the phone is turned on). The phone is still on, but doesn't respond to input. I can call it, but nothing happens. I can connect the charger, but it doesn't respond.
I did not experience the issue before rooting. After rooting and installing CyanogenMod, the problem occurred perhaps 1-2 a week.
Recently I encrypted my phone. After that the problem has become much more frequent. The screen is now unwakable roughly 2-3 times a day, some times even more!
The only solution I have found, it to either turn the phone off via the red off button next to the SIM card, or by rebooting it by holding the power button in for so long.
The issue is extremely annoying, especially after it started occurring 2-3 times a day.
I have tried searching for similar issues, but haven't found any solutions.
I have tried changing the brightness levels so the max level is 99% instead of 100%, as someone had suggested, but that hasn't made any difference. Unscrewing the phone and cleaning the proximity sensor, as someone else had suggested, is something I haven't tried yet, as I don't feel competent enough to unscrew the phone.
The phone used to have the protection plastic provided from the fabric, but I tore that off not too long ago. No change in behaviour.
I have not managed to find one special event that triggers this behaviour or reproduce the issue on demand.
Hopefully someone will have some tips as to what I can do to solve this issue. Thanks in advance.

Any modifications on the kernel? Like special governors or under/overclocking?
As you are using a custom ROM the clear advise here is: try out with stock ROM and see if the problem is still there.
If not, it is a problem with the ROM.

I'm having the exact same problem. I flashed cm11 snapshot two days ago, and today my screen wouldn't wake no matter what.not even a restart would solve the issue, cause the moment the phone goes to sleep after a boot, that was the last time the screen was on. I'm following this thread in case somebody comes up with a solution.

hi there, my phone is acting the same way as yours described. Mine is rooted on stock lolipop and it never happened before although i had a replacement unit and the one before that acting the same way. Pressed the power button and nothing happend regardless screen on or off. Had to do hard reset and it worked for like 1 or 2 days. I went to sony talk forum and ppl seems to say it a bug since the phone released. If anyone got anything would be great help. Thanks

Home button sometimes not working and Screen randomly shuts off

I'm using my dad's Note 10.1 (2014) and I've been experiencing some problems. The screen would randomly just turn off (but it doesn't shut down) when I looked away. I thought it was the smart eye detection feature thingy but when I checked, it was already turned off. Another problem is that the home button and/or the capacitive just randomly stops working. Had to reboot the device in order to get it working again. At first I thought it was some hardware problem but I'm pretty sure it isn't. So yeah. Does anyone face the same problems? I've heard this device have some software issues that causes this but after some searching I got no answers.

Hi
I have your problem too. i have thiss issue on Stock rom. i use for one day Resurrection Remix ROM. i havn't see this issue.

Touchscreen issues

Hello All,
I know there have been a lot of touchscreen issues with the G4 in 2015 but is it still happening for some users? The touch screen issue i have been having is very intermittent and only occurs when you wake the devices up. So when you wake the device no touch input is detected. I can tap any where and it will not register any touches. I will then put the device back to sleep and wake it up again, then it'll work normally.
Not sure if this is normal but is anyone else having this issue? Should i be concerned or RMA the device or is this more of a software bug?
I can use all the diagnostics test tools and it'll pass since the issues is not lagging or missed touches.
Thanks all!

Try to reflash the firmware via lgup or lg flashtool

I have this problem too but it seems more random than just when the screen wakes up and has occurred while I've been in the middle of doing something on my phone. It's simple to solve by turning the screen off and back on again but it's very annoying when it happens.

Yeah, that sounds really annoying....Wonder if it's a bug. Going to try a reflash and retry. Hopefully it'll solve it.

Nexus 5X fingerprint (Nexus Imprint) sensor caused crash?

I bought a used Nexus 5X off eBay. It was running 7.1.2. I did a factory reset, and when I get to setting up fingerprint, it will not read my fingerprint at all. Even worse, about 1 min after it started reading my fingerprint, even if I'm no longer at the fingerprint setup page, the phone will crash and won't boot up until I hard reset it (long press the power button)
I searched online and saw some issue about Google breaking the fingerprint sensor with the 7.1.2 update. I then let the phone update to Oreo 8.0 but the same problem persists.
Is this a known issue? Or is my phone bad?