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 build01@cyanogenmod #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. :)