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The problem I am facing is that when Windows is idle for some time, instead of dimming the screen, it turns on full brightness. I know this may be problem in power configuration somewhere but I cannot seem to find it.

UPDATE: I use a Sony VAIO VPCS116FA, Windows 8 Pro and I have installed latest NVIDIA drivers.

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More information is required. What brand of laptop? Have you installed Windows 8 compatible drivers? –  Ramhound Nov 15 '12 at 22:46
    
Updated with information from the comment above. –  Waqar Hameed Nov 16 '12 at 0:07
    
Are those the drivers from the nVidia website, or via Windows Update? –  Rowland Shaw Nov 16 '12 at 9:59
    
Sony VAIO support site. –  Waqar Hameed Nov 16 '12 at 18:33

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