Anyone find a work around for the brightness issues from kernels 5.13/14?
I set up /etc/rc.local to set brightness at boot time before upgrading to the 5.13 kernel. If you do this and accidentally turn the screen off, rebooting the phone will bring the screen back. If you have ssh access you can do it from the command line.

On Mobian, rc.local is not enabled by default, you have to set up a systemd unit file for it. This is the command to run at boot or from ssh as root:

echo 400 > /sys/class/backlight/backlight/brightness

(The number "400" is an example, higher number is brighter screen. I'm actually using 600 - not sure what the max is.)

Messages In This Thread
RE: Anyone find a work around for the brightness issues from kernels 5.13/14? - by Zebulon Walton - 08-31-2021, 05:41 PM

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