Whenever I try to change the screen brightness using the Fn+F4/F5 keys in Windows, an overlay appears, but there is no change in brightness. The blue bar indicating the current brightness level doesn't show up on the overlay anymore either.
What's weird is at the BIOS loading screen, I can change the screen brightness just fine!But after it starts to load Windows ("Starting Windows..." with the animated logo), it's no longer than 2 seconds, and I can't change it anymore.
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It's almost as if Windows is hijacking my screen brightness controls... Any advice?
Issues with changing screen brightness
Discussion in 'Alienware 14 and M14x' started by Joobles, Jan 2, 2012.