this doesn't work I guess.
xrandr --output default --brightness 0.1
xrandr: Gamma size is 0.
xrandr --output default --brightness 1 1
xrandr: Gamma size is 0.
xrandr --output default --brightness 0.1 1
xrandr: Gamma size is 0.
xrandr --verbose |egrep '(Bright|Gamma)' 1
xrandr: Failed to get size of gamma for output default
ls -l /sys/class/backlight 1
total 0
cat brightness
cat: brightness: No such file or directory
cat brightness 1
^C
cat /var/log/Xorg.0.log | grep "intel" 130
[ 65.503] (==) Matched intel as autoconfigured driver 0
[ 65.503] (II) LoadModule: "intel"
[ 65.508] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 65.554] (II) Module intel: vendor="X.Org Foundation"
[ 65.578] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
lspci -k|grep -iA3 vga
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 21)
Subsystem: Dell Device 06ac
00:0b.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power Management Controller (rev 21)
Subsystem: Dell Device 06ac
I suspect the fix can be found here:
http://forums.debian.net/viewtopic.php?f=5&t=117219
but im not sure if I should try that.
