Hi and welcome, If you want to get your hands dirty on driver development, I can suggest the stub driver for brightness and display-controls[1]. A lot of people would like to have those controls and the ACPI and the ACPICA specifications are quite good. The driver detection code is done, what is needed is installing handlers for notifications and acting on these. See 'ACPI Extensions for Display Adapters' in the ACPI spec. /Fredrik Holmqvist, TQH [1] http://haiku.it.su.se:8180/source/xref/src/add-ons/kernel/drivers/display/display_controls.cpp