Hello Damian, >>> and take a look if /sys/class/backlight/acpi_video0/ is present: On an IBM T61 i have acpi_video1 too. Video0 represents the vga/dvi output where video1 represents the LCD. Also have a look on max_brightness on this dirs for the maximum value.
>> >>> You can use xev to see which keycode is emmitted and then look in your >>> desktop environment if this is match with some action. >> In fact, Fn + dimming keys produces output. Now, to do something >> useful, I need to know how to dim the light of the LCD. As workarround you could switch to a console (Ctrl+Alt+F1) and try to dim with your fn+ keys. >> >>> Well. it should be somehow applicable, because it is rather generic. >> I don't know how to replace this line >> echo "level ${LEVEL}" > /proc/acpi/ibm/brightness >> >> I have a file >> /proc/acpi/video/C14B/C160/brightness >> whose contents look like >> levels: 100 51 30 37 44 51 58 65 72 79 86 93 100 >> current: 72 Be careful to touch the right (video-)output. In /proc/acpi/video i have two devices: VID and VID1. VID1 references to my LCD. Steffen