Go to /sys/class/backlight and check if you have intel_backlight
-
addacpi_backlight=vendorto the end ofGRUB_CMDLINE_LINUX_DEFAULTline -
create
/etc/X11/xorg.conf.d/10-intel.conffile -
add the following configs into the file created above
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "Backlight" "intel_backlight"
EndSection