I have a mid 2010 macbook 2.53 i5 running mountain lion (listed in sig) and am all the sudden not able to adjust my brightness with the keys. When I press either key the overlay window for brightness shows on the screen but they do nothing. There is no circle with line to say the setting is unavailable and when I try to adjust brightness the system preferences menu the slider can be dragged but immediately falls back to the far left position. Something is out of whack and I'm not sure how to straighten it out. Please help?
Apparently another reboot set things straight. Resolved.
Apparently another reboot set things straight. Resolved.
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