Dot files, config files, scripts, etc.
Adjusting the brightness with xbacklight does not work using
integrated graphics. Create the file
/usr/share/X11/xorg.conf.d/20-intel.conf with the following
content.
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection