I have an old acer laptop with following graphics hardware:
00:02.0 VGA compatible controller [0300]:
Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller [8086:8108] (rev 07)
Subsystem: Acer Incorporated [ALI] Device [1025:0244]
I used xbacklight's xbacklight -set XX
and xbacklight -dec XX
commands but they don't work. If I put these commands, the output is
No outputs have backlight property