Tested Ubuntu 12.04.03 (kernel 3.8) and brightness hotkey works fine. I am going to verify https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1249978/comments/2 on kernel 3.2 and to backport if it is the fix.
Tested Ubuntu 12.04.03 (kernel 3.8) and brightness hotkey works fine. I am going to verify https:/ /bugs.launchpad .net/ubuntu/ +source/ linux-lts- raring/ +bug/1249978/ comments/ 2 on kernel 3.2 and to backport if it is the fix.