User-agent:
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1
I rebooted my Ubuntu phone earlier today, and it didn't boot up again.
The screen is completely off, and pressing and holding the power button
does nothing. The phone had plenty of charge before I rebooted. Is there
anything I can try to resurrect it?