Adjusting screen brightness is essential for comfortable viewing and battery efficiency on laptops and some desktop monitors. In Windows 11, users can normally change brightness through the Quick Settings panel, keyboard shortcuts, or display settings. However, sometimes the brightness slider may stop working, disappear, or fail to change the display brightness.
This issue usually occurs due to outdated or corrupted graphics drivers, disabled monitor drivers, incorrect power settings, or system glitches. In some cases, Windows updates or driver conflicts may also cause brightness controls to malfunction.
If brightness is not working in Windows 11, try the troubleshooting methods below.
How to Fix Brightness Not Working in Windows 11
Work through the following solutions in order. After completing each step, check whether the brightness control starts working again.
1. Restart Your Computer
Temporary system glitches may prevent brightness settings from functioning properly.
- Close all running applications.
- Press Windows + X.
- Select Shut down or sign out > Restart.
After restarting your computer, try adjusting the brightness again.
2. Adjust Brightness From Settings
Sometimes the brightness slider in Quick Settings may not respond correctly.
- Press Windows + I to open Settings.
- Go to System > Display.
- Locate the Brightness slider under the Brightness & color section.
- Move the slider to adjust the brightness.
If the slider is missing, the display driver may be the issue.
3. Update Graphics Drivers
Outdated or incompatible graphics drivers often cause brightness problems.
- Press Windows + X.
- Select Device Manager.
- Expand Display adapters.
- Right-click your graphics card.
- Select Update driver.
- Choose Search automatically for drivers.
- Restart your PC after updating.
Updated drivers usually restore brightness controls.
4. Update Monitor Driver
The monitor driver may also affect brightness control.
- Open Device Manager.
- Expand Monitors.
- Right-click Generic PnP Monitor.
- Select Update driver.
- Choose Search automatically for drivers.
After updating, restart your computer.
5. Reinstall Display Drivers
If updating drivers does not fix the issue, reinstalling them may help.
- Open Device Manager.
- Expand Display adapters.
- Right-click the graphics device.
- Select Uninstall device.
- Restart your computer.
Windows will automatically reinstall the display driver.
6. Disable Adaptive Brightness
Adaptive brightness may interfere with manual brightness adjustments.
- Press Windows + S and search for Edit power plan.
- Click Change advanced power settings.
- Expand Display.
- Locate Enable adaptive brightness.
- Set it to Off.
Apply the changes and check if brightness works.
7. Run the System File Checker (SFC)
Corrupted system files may cause brightness issues.
- Press Windows + S and search for Command Prompt.
- Right-click Command Prompt and select Run as administrator.
- Enter the command: sfc /scannow
- Press Enter and wait for the scan to complete.
- Restart your PC.
Windows will repair damaged system files automatically.
8. Install Windows Updates
System updates often include driver updates and bug fixes.
- Press Windows + I.
- Go to Windows Update.
- Click Check for updates.
- Install available updates.
- Restart your PC.
Updates may resolve display-related issues.
Conclusion
If brightness is not working in Windows 11, the issue is usually caused by outdated graphics drivers, incorrect power settings, monitor driver issues, or system glitches. In many cases, updating or reinstalling display drivers resolves the problem quickly.
By following the troubleshooting steps above, you should be able to restore brightness control and adjust your display settings normally in Windows 11.
