Any chance it could autodetect intel_backlight?
I assume there is some problem with it but haven't found an explanation yet, can you please point me to one if it's already published somewhere?
The xorg.conf solution didn't work for me on Kubuntu 20.04 it seems
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "Backlight" "intel_backlight"
EndSection
Edited by Serhiy Int