Macbook air 4,2
Backtrack 5 r3

Already installed applemcs.

Echo into /sys/class/backlight/apple_backlight/brightness, the value changes but not the brightness.

Not sure what to do now, added stuff to the xorg.conf file on device to allow brightness control

Nothing seems to be working, any ideas?

Everything else works in backtrack, I've been having lots of fun. But since it got dark, my screen is extremely bright. Any ideas?