Some Windows 11/10 users have reported that their screen brightness changes automatically or does not work properly. They can’t adjust the brightness. If Windows 11/10 Brightness slider is not working or changes automatically on your computer system, then this post will help you troubleshoot & fix the problem.
Windows Brightness Control not working
If the Brightness slider is not working on your computer system, then this post will help you troubleshoot & fix the problem. Please go through the entire list and then decide which of the suggestions you would like to try and decide the order you want to try them.
- Update your Graphics driver
- Restore default settings for the Power Plan
- Disable Adaptive Brightness
- Disable the Intel Power Saving Technology
- Disable BrightnessReset Task
- Run Power Troubleshooter.
- Use the POWERCFG Tool.
1] Update your Graphics driver
First of all, visit the manufacturer’s website and update your video and graphics drivers, for your model.
2] Restore default settings for the Power Plan
Open Control Panel > All Control Panel Items > Power Options > Edit Plan Settings and restore the default power plan settings by clicking on Restore default settings for this plan. Do this for all your Power Plans.
3] Disable Adaptive Brightness
Disable Adaptive Brightness and see. Open Control Panel > Power Options. Open your active power plan and select Change plan settings option to open the Edit Plan Settings window. Now click Change advanced power settings option to open the Power Options dialog. Next, expand Display and then expand Enable Adaptive Brightness. Set it to Off.
4] Disable the Intel Power Saving Technology
If your laptop used Intel processors, disable the Intel Power Saving Technology. You will get this setting in your Dell or Vaio Control Center. More on this at this Computer screen brightness flickering post.
5] Disable BrightnessReset Task
Open Task Scheduler using Start Search. In the left pane, you will see Task Scheduler Library. Navigate to Microsoft > Windows > Display > Brightness.
In the right pane, if you see a scheduled task called BrightnessReset, double-click on it > Properties > Triggers tab > Edit. Now disable it and see if it works for you.
If it does not help, you may re-enable it.
Read: No Brightness slider in Windows 11.
6] Run Power Troubleshooter
Run the built-in Power Troubleshooter and see it helps you. You may access it via the Windows Troubleshooters Settings Page or run the following command directly to bring up the built-in Power Troubleshooter
msdt.exe /id PowerDiagnostic
Once you hit Enter, you will see the Power Troubleshooter pop-up. Similarly, if you know the Diagnostic Pack ID of any Troubleshooter, you will be able to invoke it using the command line.
7] Use POWERCFG Tool
If you need to further troubleshoot Power Plans, use the built-in PowerCFG command-line tool.
All the best!
TIP: Windows Monitor Brightness Slider lets you add a Brightness Slider to Windows.
Screen brightness slider is there but can’t use it
The monitor doesn’t support display control
If the monitor does not support adjusting the screen brightness, use a third-party app like Twinkle Tray Brightness Slider.
With Twinkle Tray, you can effortlessly adjust the brightness levels on several monitors. This application creates a new icon in your system tray that you can click to access the brightness settings of any compatible monitor instantly. You can simultaneously change one or more displays using these brightness sliders.
Disable HDR
Disabling HDR from Windows Settings might enable the brightness slider to its previous state. Let us see how:
- Open Windows Settings and navigate to System > Display.
- Click the HDR option under the heading Brightness and color.
- If your PC supports HDR and if it is enabled, disable it and check whether the brightness slider works.
Why can’t I use my brightness button?
On most laptops, you’ll need to hold the “Fn” key while pressing the designated brightness buttons. If pressing the brightness buttons alone doesn’t work, try holding “fn” first.
Can I change the monitor brightness without buttons?
It can be through keyboard shortcuts, automatic adjustments based on lighting, dedicated monitor software, or built-in operating system controls. So if you fail to find the button or software, look for more options as above.
Cannot change brightness in Windows 11
If you cannot change brightness in Windows 11, disable Adaptive Brightness and update your device drivers. If there is any OEM software that controls your display settings and brightness, disable or uninstall it and see. If you’re using an external monitor, brightness is usually changed via its physical buttons or on-screen menu.
