hey, i've been having this problem for a couple of days and since i'm not a very experienced user, i couldn't find what to do. the problem is, whether i plug in my macbook or not, it stays at the minimum screen brightness level. i use it plugged in generally, but now there is no difference in the brightness and it's very tiring to use it this way. the energy saver options look ok, i haven't changed anything from the custom settings. hope someone knows what to do. thanks.