same thing for me on an inspiron 9400 , i see with xev that when you press the key for brightness an infinite loop or something like that starts , in effect information scroll a lot about a key pressed
-- Cannot change LCD brighness on Inspiron 6400 https://launchpad.net/bugs/73286 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
