Windows 8 and 8.1 Forums


lcd screen brightness on a laptop

  1. #1

    lcd screen brightness on a laptop


    alright, can someone tell me all the possible ways to adjust one's screen brightness within windows 8 on a laptop?

    for some odd reason the laptop only adjusts the brightness when on the battery and it does that intelligent adjustment crap(tried to find a more polite word....failed).

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  2. #2


    Posts : 1,925
    Windows 8.1 Pro


    WinKey+I and then in the lower right near the power button is the brightness adjustment.

    Most laptops have function keys to adjust brightness as well, but you usually have to install a driver.
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  3. #3


    Webster NY US
    Posts : 325
    Win 7 / Win 8


    Check your power management settings in the control panel. The default settings for a laptop will regulate the display brightness when running on battery. Not sure what laptop you have, but it might also have an ambient light sensor to adjust brightness depending upon that, too. When the AC is hooked up, the power management software lets the display be brighter. But all that should be configurable in the control panel.
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  4. #4


    where would I find the light sensor option?

    my laptop is a sony.

    it dims automatically on darker backgrounds when not plugged in and I dont know how to turn that off. that'll get annoying when I wanna watch movies at my aunt's this christmas.
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  5. #5


    Webster NY US
    Posts : 325
    Win 7 / Win 8


    Quote Originally Posted by xraiderv1 View Post
    where would I find the light sensor option?

    my laptop is a sony.

    it dims automatically on darker backgrounds when not plugged in and I dont know how to turn that off. that'll get annoying when I wanna watch movies at my aunt's this christmas.
    LOL yeah, that autodimming is annoying when watching a movie. I had that happen to me with my daughter's Macbook Pro.

    As far as the auto dimming via the ambient light sensor, you could try checking display driver settings. There should be some setting that tells it whether to auto-adjust. Mine doesn't have that feature, so unfortunately I can't check on my laptop. Mine only adjust based upon whether I'm on battery or AC, which is in the power management settings.
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  6. #6


    well, a means of turning that off would be welcome.. whatever makes my display dim on battery I mean.
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  7. #7


    Posts : 1,925
    Windows 8.1 Pro


    From your original question, you asked how to adjust the brightness. I told you how to do that.

    From your other comment, it seems you don't want to know how to adjust the brightness after all, you just want to disable adaptive brightness. Go into your power profile settings, and one of them is "Enable adaptive brightness", so turn that off.
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  8. #8


    its both, as I suspect I have something of a problem that i'm trying to learn to troubleshoot on my own. I cant always call tech support, so it would behoove me to know how to do it myself.
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  9. #9


    alright, found brink's tutorial, theres no light sensor setting....
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  10. #10


    Posts : 376
    W8.1, W7


    Hello, try going to control panel > (system and security) power options > change plan settings > change advanced power settings and you should see 'Enable adaptive brightness' (see picture). If not there, Sony may have made it's own plan, try another plan (Balanced).
    Attached Thumbnails Attached Thumbnails Capture.PNG  
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lcd screen brightness on a laptop
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