New PinePhone won't boot 9/10 times - Screen is on but stays black :(

[dcinoz]

Interesting: It seems that the phone is always booting up without problems if it was turned off for a longer time (some hours).
If it was turned off only for a few seconds, the boot problem appears.
(But perhaps it's just coincidence...)

Hi @dante404 

Plasma Mobile had problems a while back whereby after updates the screen would be black upon restart, screen brightness was set too low and for some Pinephones it meant black screen.

Mobian since bookworm (not sure when it started) has an issue too, it happened to me after I switched to bookworm and ran updates after reboot and coming out of suspend a few times, it's a known issue: https://gitlab.com/mobian1/issues/-/issues/336

For Plasma Mobile I had an rc.local bash script to set the brightness at boot, not sure if I've done the same for Mobian. You can hook it into systemd (see https://forum.pine64.org/showthread.php?...6#pid95096 and look at the Manjaro bug report). For the black screen on resume I have set the screen brightness on resuming (coming out of sleep).

Not sure this will help but it would hopefully be a workaround if it's a screen brightness setting only (hopefully it's nothing more serious).
Here's a link to using that approach to reload the Realtek wifi module (no idea if that has been fixed), you can adapt that to set the brightness level instead:
https://forum.pine64.org/showthread.php?...8#pid87988

It's unclear whether your phone fully boots or not. If you turn on wifi and have ssh set up, restart and it should have wifi and ssh available upon restart so you can (hopefully) ssh into the phone even if the screen is black and do some further digging or manually increase the brightness via command line if that is the only issue.