Windows 8 and 8.1 Forums

Cannot change brightness on 8.1

  1. #1

    Cannot change brightness on 8.1

    I received an acer Aspire r13 as a school laptop. For some reason I am not able to change the screen brightness. The icon appears like this Click image for larger versionI have tried using function+arrow keys but nothing works. I have turned off adaptive brightness but still nothing. my laptop is stuck at a very bright level, rendering it unusable during the evening/night. Any help will be much appreciated

      My System SpecsSystem Spec

  2. #2

    Posts : 2,073
    Windows 8.0 x64

    Have you checked for newer graphics drivers or graphics control settings program? If you try different drivers and System Restore works on your PC, make a Restore Point before changing the driver so you can get back to square one if things end up being worse.

    Another thing you could try is checking out all the settings in the power profiles. Sometimes there is a brightness setting that may override the main setting.

    If all else fails there's the old Jedi Support Trick. Boot into Safe Mode and go into Device Manager. Delete or uninstall the offending device and reboot. Windows will say "new hardware found" and install the driver that you deleted. For some weird reason this seems to fix many device issues in Windows. It works quite often and is very low risk.
      My System SpecsSystem Spec

Cannot change brightness on 8.1

Similar Threads
Thread Forum
Laptop cannot sleep, change brightness, and more.
I purchased my Dell Inspiron 15 3537 laptop a year ago and up until recently it had worked fine, however recent problems i have encountered have been as follows: -If i close the lid or use any other method to try to put the laptop into sleep mode the screen will turn off, as normal, but it cannot...
General Support
Windows 8.1, cannot change brightness
Hi new here. Got a new computer over the holidays. Everything was working great for about a week. Then I couldn't change my brightness anymore. 1) The FN key does nothing with the brightness. It works for sound controls and other shortcuts but not brightness. 2) Trying to change the brightness...
Drivers & Hardware
My brightness won't change. Please help.
I've had my laptop for about a month now(It is an ASUS I don't remember the exact model, but it has a 745 Nvidia GEFORCE Graphics Card) and everything has been working fine until a few days ago I noticed my screen won't change my brightness no matter what I try. I've used the fn hotkeys, Power...
General Support
Cannot change brightness after updating to Windows 8.1
I recently got an Asus X550LA and updated to Windows 8.1, since then I cannot change the brightness level. In the settings charm the brightness charm says unavailable. I found posts similar to this, and none of the suggested solutions have not worked. I've tried: Switching to Microsoft...
Drivers & Hardware
Cannot change screen brightness in Win 8.1
Hey, Guys. I just yesterday finished my new computer (16Gb RAM, i5-4470k, GTX 770, Win 8.1, etc.) and I just today realized that I cannot change the screen brightness. The button is grayed out and says "Unavailable" which I know cannot be possible. Now, i have done my research and people say...
General Support
Can't change laptop brightness on 8, but I can on Win 7
I have an Acer Aspire 8930G with Windows 8.1 x64 and Windows 7 x86 as a dual-boot. I use 8.1 as my everyday OS and only boot into 7 to play older games that only work with a 32-bit OS. Ever since I installed Windows 8, I have not been able to adjust the brightness of my screen. Note that this...
Graphic Cards
Can't change the brightness of screen.
I have gone into the control panel and tried changing the screen brightness but nothing seems to work. I am the system administer so I should be able to set all changes. Hope you can give me some direction.
General Support

Eight Forums Android App Eight Forums IOS App Follow us on Facebook