Comment 2 for bug 949088

I have similar issues (macbook pro 5,3):
when I start with lower brightness (on battery for example) the brightness up (f2) control works fine. turning brightness down however (f1) appears to work while holding it down, but then 'resets' to full brightness when the key is released.

running latest 12.04 updates as of today (2012.04.14)