9 Replies Latest reply on Dec 7, 2015 2:55 PM by JohnRoss2113

    Dell XPS 14 (L421x) + Intel HD 4000 + Windows 8.1 - Brightness control problem



      I've got the problem with brightness control on my laptop. Now it's only 100% brightness and all methods from this forum or other else doesn't resolved this issue.



      When I try to increase\decrease brightness (Fn+F4 \ Fn+F5) - it's changed only in Windows settings (see attached fig.1)


      1. Adaptive brightness in Windows Power settings is SWITCHED OFF.

      2. When I choose the Default Windows video driver - brightness control works perfect.

      3. With Windows 8 and old Intel driver - it was worked, but now it's Widows 8.1)



      So, I'm sure the issue with Intel HD 400 drivers. Please help me to resolve!




      Dell XPS 14 (L421x)

      Intel HD 4000 driver

      Windows 8.1 x64