my config files for desktop
windows manager: i3
printscreen
lenovo E480 brightness setting (based on https://wiki.archlinux.org/index.php/Backlight)
echo {0-1000} > /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight
zero arg will off the light completely !