Backlight / display brightness reset to zero on reboot
The backlight of the PinePhone on plasma-mobile keeps resetting after rebooting. It might be related to systemd-backlight@.service, not restoring the backlight state prior to boot.
The system becomes unusable and is impossible to login.
After setting the display brightness on System settings, the brigthness (and other files under /sys/class/backlight/backlight/) work as expected, until rebooting / shutting down the PinePhone