Fix Brightness Not Working: How to Force Change Brightness on Windows

Windows uses many optimizations and features to ensure your laptop uses minimal power when unplugged from the wall. This helps extend your laptop’s screen on time without compromising on performance as much as possible. However, you might have noticed that your laptop dims the display whenever the battery-saver mode is activated on your PC be it automatically or manually — it may now allow you to change brightness either.

While this can help save power and extend your laptop’s screen on time, it can make it difficult to view your screen in certain cases. If you find this to be annoying, then you can easily disable this setting. Let’s take a look at how you can disable this on your Windows 11 PC.

Related: 10 Ways to Change Brightness on Windows 11

Fix Brightness Not Working Issue: How to toggle off automatic display dimming when your PC is low on battery

If you’re facing dim display or brightness issues when your PC is running low on battery with the battery saver turned on, then it is due to how Windows 11 is designed to manage battery life on your device. You can disable this feature for better legibility and visibility at the cost of extra power usage. Follow the guide below to help you along with the process. 

1. Press Windows + i and click Power & battery.
2. Click and expand Battery saver.
3. Now turn off the toggle for Lower screen brightness when using the battery saver.
   

And that’s it! Your screen brightness will no longer be dimmed when using your device on a battery saver.

Control Brightness Yourself: How to turn off adaptive brightness on your PC

You can also turn off adaptive brightness which uses your PC’s proximity sensor to change yoru display’s brightness depending on your current ambient light. This can also lead to your display dimming randomly in case the proximity sensor is facing issues or a light source is directly pointed at it. Here’s how you can disable adaptive brightness on your PC.

1. Press Windows + i and click Display.
2. Now expand Brightness by clicking the arrow beside it.
   
3. Uncheck the box for Change brightness automatically when lighting changes.

And that’s it! You will now have disabled adaptive brightness for your PC.