Screen dimming after 20 seconds

  1. Posts : 2
    Windows 10

    Screen dimming after 20 seconds

    This just started today, but my laptop screen dims every 20 seconds if I'm not doing anything. Doesn't matter if I'm gaming, watching a video or whatever, if there's no mouse movement or key strokes, the screen dims from it's highest to lowest setting without fail.

    I've tried adjusting the power options, ensured that 'turn off display' and 'sleep' are set to 'never' for all settings, confirmed my drivers on my GPU are up to date, ran all Windows updates, checked the registry and confirmed that the brightness settings are set to %100... I'm at a complete loss as to why this is happening. What's even more strange is that nothing, that I'm aware of, updated today or yesterday, but the issue began as soon as I started my laptop this morning...

    If anyone has any ideas or suggestions on how to stop this, I'd love to hear them.
      My Computer

  2. Posts : 1,467
    Windows 10 Pro

    Are there separate settings for the screen "outside" of the Windows power settings? Some screens offer settings for different usage - Standard, Dynamic, Video, etc. Check the device manual.

    Make/model of laptop.

    Check the Update history > Driver updates. Any recent firmware/display/video updates?
      My Computer

  3. Posts : 11,598
    Windows 10 Home x64 Version 21H2 Build 19044.1776

    I used to get this. I fixed it using

    Add or Remove Dim display after from Power Options - TenForumsTutorials

    Using the interface is a bit easier than setting the value using PowerCfg commands but, just for info, this is the relevant PowerCfg section. Settings these values to 0 stops that dimming.
    Subgroup GUID: 7516b95f-f776-4464-8c53-06167f40cc99 (Display)
    Power Setting GUID: 17aaa29b-8b43-4b94-aafe-35f64daaf1ee (Dim display after)
    Minimum Possible Setting: 0x00000000
    Maximum Possible Setting: 0xffffffff
    Possible Settings increment: 0x00000001
    Possible Settings units: Seconds
    Current AC Power Setting Index: 0x00000000
    Current DC Power Setting Index: 0x00000000

      My Computer

  4. Posts : 2
    Windows 10
    Thread Starter

    Try3 said:
    Thanks, but I'd actually tried that before I posted here. I managed to figure it out this morning, though. I noticed it didn't dim the screen at the logon page after powering the computer on, so assumed it had to be a program launching when the PC starts. Looking through my startup applications, I noticed something called Tobii was running at the start; some sort of eye tracking thing. Disabled it and it's no longer dimming the screen!
      My Computer

  5. Posts : 11,598
    Windows 10 Home x64 Version 21H2 Build 19044.1776


    I'm glad it is sorted out now.

    If you do ever decide to investigate further [so you can make use of Tobii], I think it would be worthwhile checking the state of the PowerCfg results I coloured blue in my previous post both before & after Tobii starts.
    - If all Tobii is doing is overwriting those entries when it starts up then you might be able to leave it on but automatically follow it up with a batch file to set those values back to 0 afterwards.

    To get PowerCfg properties, I use this command [in a cmd or PS window, both can run it]
    PowerCfg -qh >D:\Desktop\PowerProperties.txt
    - You'd want to replace my D:\Desktop with the path to a convenient folder of your own choosing.
    - The -qh switch lists all current power plan properties. Using the more standard switch -q omits 'hidden' power properties which can be misleading. The -qh switch was still not documented anywhere the last time I looked but has existed since Windows 7 if not earlier.
    - PowerCfg - SS64

      My Computer

  6. Posts : 11,598
    Windows 10 Home x64 Version 21H2 Build 19044.1776

    You might also be interested in this link, posted by forum member Paul Black,
    Get started with eye control - MSSupport

      My Computer


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