Screen Brightness won't change no matter what I do

Question

Hello guys:
For the time I've been using ArchLinux my screen brightness buttons don't work.  Also power options for adjusting screen brightness do nothing, so you see why I have a problem, my screen eats the laptop's battery... I've also tried adjusting the values of /proc/acpi/video/GFX0/DD02/brightness, but saw no effect.  I'm using an Acer Aspire 5740-5513, which has an intel core i3 using Intel Graphics Media Accelerator HD

Answer 1

Hey guys, the following script I wrote might be useful for increasing/decreasing and/or setting brightness to min/max using 'xbacklight' so you can bind it to some of your key combination. For example i have FN+f2 set to '/path/to/script down' to decrease '/path/to/script up' to increase etc ...
Respect
#!/bin/bash
if [ $# -ne 1 ]
then
exit 1
elif [ $1 == "down" ]
then
xbacklight - 10
elif [ $1 == "up" ]
then
xbacklight + 10
elif [ $1 == "max" ]
then
xbacklight = 100
elif [ $1 == "min" ]
then
xbacklight = 10
fi