i have the strangest wakelock i can't figure out why it is happening.
I have a samsung tab 4 7 inch and i use wakelock detector to work out what is causing my phone not to sleep. i charge my tablet on and off when needed and from time to time for some inexplicable reason it refuses to sleep after i unplug it from the charger (but not every single time! only once or after a second charge) i can't figure out the pattern, i charge it once and unplug (by unlocking screen first always then unplug to eliminate that wakelock) and it'll be fine, then maybe my second charge that day i'll unlock it after waking it up first and then it'll have a massive no sleep time all red on wakelock detector.. i can't figure it out?
i thought maybe the usb port may be slightly damaged but even when i use a different charger and samsung cable the waklock does not go away it's completely red almost. the only thing that seems to fix it annoyingly is restarting the phone and then using adb terminal services and using the wakelock detector instructions how to use it with kitkat (it requires adb terminal stuff), after that it sleeps perfectly but this is really annoying having to do it every day or so plugging it into a laptop and running adb services and terminal.
can anyone explain why this fixes it and what is happening?
i've tried several things which don't work which normally work on my other samusng devices, powering up in flight mode with wifi off then switching wifi on.. doesn't work. trying a different charger different cable. same issue.
the wakelock it says which is causing the issue is powermanagerservice.display
could it be the pins in my samsung cable that's doing it?
i did notice it happened once on my notepro 12.2 too with same wakelock.. maybe because once it's there no matter what cable i use it stays until i clear it, but like i said i can charge it again with same cable and charger and it'll be fine, but then if i do it a second time later or third the issue comes back.. inexplicable.
could wakelock detector itself be causing this wakelock if powermanagerservice.display is at the top and actually running adb services with terminal emulator fixes it?
there;'s no way for me to check without uninstalling wakelock detector and relying on battery drain as a guide