Screen Brightness control disappeared after upgrading to Mountain Lion
Hello all.
I've just upgraded to Lion, and now I can't adjust the brightness of my screen anymore!
Anyone else has this problem?
MacBook Pro, OS X Mountain Lion
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I was having the same problem after I completely tore down my Macbook Pro mid-2010 in order to replace the keyboard. (Phew!) After re-asssembling, everything was working again except for the screen brightness buttons (F1,F2). I figured it was a bad keyboard, but after zapping the p-ram, the brightness buttons now work as they should. Thanks for the tip!