Windows 8 and 8.1 Forums


unable to adjust screen brightness - windows 8.1 - ASUS

  1. #1

    unable to adjust screen brightness - windows 8.1 - ASUS


    I've noticed, today, that I'm suddenly unable to adjust my screen brightness. I have read half a dozen threads reporting the same problem; I tried all the solutions therein (from updating the driver and reverting to the most basic one to manually changing power configurations) and nothing worked. Unlike the vast majority of users who had this problem, this hasn't happened following an update to windows 8.1 (which I did several months ago -- and the adjust was working fine after that).

    This might give you a hint:

    * As I try to adjust it using the fn key (as I had always done previously), brightness goes up or down just one level -- and that just 'cosmetically', as in fact nothing changes. The indicator gets stuck approximately in the middle of the bar, unable to reach the extremes.

    * There is more: on power management, I chose the lowest possible level of brightness when working on battery, just to see what would happen. I then disconnected my laptop from main power, and... the brightness indicator did go down to the lowest level, YET brightness remained unaltered in fact.

    Anyone, please??

      My System SpecsSystem Spec

  2. #2


    Posts : 2,690
    Windows 3.1 > Windows 10


    try turning off Adaptive Display in advanced settings under power management

    Attachment 56062
      My System SpecsSystem Spec

  3. #3


    Hasn't worked :-( I even tried restoring plan defaults, and still brightness keeps 'locked' in what appear to be the 40-60% range.
      My System SpecsSystem Spec

  4. #4


    Posts : 187
    Windows 8.1 Pro/ Windows 8 Enterprise


    Did you install the latest ATK Package for Windows 8.1? If you didn't go to ASUSTeK Computer Inc. -Support- Drivers and Download and search for `ATK Package` then use the Fn key to adjust the brightness.

    Good luck, werty
      My System SpecsSystem Spec

  5. #5


    Posts : 1
    Windows 8.1x64


    Quote Originally Posted by werty View Post
    Did you install the latest ATK Package for Windows 8.1? If you didn't go to ASUSTeK Computer Inc. -Support- Drivers and Download and search for `ATK Package` then use the Fn key to adjust the brightness.

    Good luck, werty


    Very helpful. Many thanks!
      My System SpecsSystem Spec

unable to adjust screen brightness - windows 8.1 - ASUS
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