> * power button. could not even reboot the phone (or maybe have not waited
> long enough? pressed on it for about a minute), had to do reboot via shell
Power button not responding indicates a problem at the level of USC (since the power button is handled internally by USC). A backtrace of USC when the phone is in this state could be helpful:
$ sudo gdb -p $(pidof unity-system-compositor)
...
(gdb) thread apply all bt full
> * power button. could not even reboot the phone (or maybe have not waited
> long enough? pressed on it for about a minute), had to do reboot via shell
Power button not responding indicates a problem at the level of USC (since the power button is handled internally by USC). A backtrace of USC when the phone is in this state could be helpful:
$ sudo gdb -p $(pidof unity-system- compositor)
...
(gdb) thread apply all bt full