Windows 8 and 8.1 Forums


Unable to change screen brightness

  1. #1


    Posts : 4
    Windows 8.1

    Unable to change screen brightness


    I've bought a laptop that I've had for more than 4 months now, and within the last week have been unable to change the brightness of the screen (from the control panel or the FN keys). I've scoured the internet for an answer (and solution), but I've had no luck.

    It's not the upgrade to 8.1 that did it because it worked until last week (8.1 was probably on my laptop). I've tried changing the display driver, which to some extent works (when the driver is changed, the brightness will change to the control panel setting). I want a better solution to doing that each time (I change my brightness often enough for that to be a problem). I've also tried rolling the driver back which did nothing.

    Information: AMD-10 based Lenovo Win-8.1 laptop.

    If you need any more information, please ask me for it!

    Thanks,
    Hex

      My System SpecsSystem Spec

  2. #2


    Hi Hexillium and welcome to Eight Forums,
    Ummm, have you messed up with start-up programs?.
    Just give it a little check by going to Task Manager then start-up section and give me a screen shot.
    I had this problem too and it could be because you disabled the driver from starting automatically upon boot-up, i had this disabled:
    Click image for larger version
    If you have the same program installed check if its disabled, if you don't give me a screen shot please.
    Alex.
      My System SpecsSystem Spec

  3. #3


    Posts : 4
    Windows 8.1


    Hello, thanks for responding.

    I have messed with the startup programs, but only with things I know. I've only just had this problem, and I can't think of anything I've done to cause it, either (I've not recently touched regedit, or msconfig or taskmanager startup).

    I have never seen 'IDT PC Audio' on my laptop, either.

    Click image for larger version

    I'm going to check what I've exactly done recently (including program updates etc), and try to check the software drivers.
      My System SpecsSystem Spec

  4. #4


    Okay,
    Go to msconfig and check Normal start-up and try a reboot.
      My System SpecsSystem Spec

  5. #5


    Posts : 4
    Windows 8.1


    Amazingly, that's worked, though I've disabled nothing recently, and it's only started happening, so I'm shocked.

    I'll try a reboot on custom, and see if it still happens.
      My System SpecsSystem Spec

  6. #6


    So happy you got it to work
      My System SpecsSystem Spec

  7. #7


    Posts : 4
    Windows 8.1


    So what actually do you think wasn't being allowed to startup? A driver? If so, then how did the screen work at all, and how could I change its driver (and it still didn't work)?
      My System SpecsSystem Spec

  8. #8


    Yes, you messed up with the start-up and it went to custom start-up and the driver was not loaded, when u checked normal mode it was loaded and working now, please mark your thread as solved and the thumbs up button if it helped.
      My System SpecsSystem Spec

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