KERNEL=="intel_backlight", SUBSYSTEM=="backlight", ACTION=="add", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness" RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"
KERNEL=="ddcci[0-9]*", SUBSYSTEM=="backlight", ACTION=="add", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness" RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"