Comment 4 for bug 581834

first install was karmic then update to lucid now update Maverick beta an final,
all of them have same problem for me.

decrease works fine

increasing didn't

actual in Maverick this happens

I decrease brightens to lowest level
then push brightness button, brightness and brightness level indicator are increasing for a short time (aprox 500ms) and then decreases immediate to last state.

holding increase button constantly pressed ends in random increasing and decreasing the brightness