# https://wiki.archlinux.org/title/backlight#Udev_rule
ACTION=="change", SUBSYSTEM=="backlight", RUN+="/bin/chgrp video /sys/class/backlight/amdgpu_bl0/brightness"
ACTION=="change", SUBSYSTEM=="backlight", RUN+="/bin/chmod g+w /sys/class/backlight/amdgpu_bl0/brightness"