reset button under back cover, below the camera
#1
there is a reset button under the back cover, below the camera
What is it good for?

I checked the user manual and the https://wiki.pine64.org/wiki/PinePhone. Neither of these are giving any clue.

https://forum.pine64.org/showthread.php?...ight=reset
says that there is no factory reset, so what is it then?
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#2
I believe it's a hard reboot, like pushing the reset button on a desktop computer, in the event the software is completely locked up.
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#3
The schematic shows it operating directly on the A64's reset line, so it's rebooting the processor without directly affecting other parts. That _may_ make it a safer hard reset than just pulling the battery if your modem has the stock firmware, assuming there isn't a side effect of that reset causing a hard reset on the modem. I imagine it could make some low level development easier too.

The stock modem firmware is an embedded linux with has a filesystem mounted read-write, and if you're unlucky it can be corrupted if the modem isn't shut down cleanly before power is removed. The community firmware avoids this by not mounting the filesystem read-write.
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