Windows 11 Brightness Slider has no effect on actual brightness

Question

Why is my Windows brightness slider is adjusted, but has no proper effect on actual brightness? No matter how you adjust the slide, brightness is always at max, only decreases (dims) between 40 and 55.

When I go to the vod website and turn on the movie, the brightness becomes maximum.

I have tested every possible Intel HD graphics driver version out there and checked it in three different OS; Windows 7, 10 and Ubuntu. Shows the same symptoms in each.

Might it be the bios, graphics driver or the hardware issue?

Answer 1

Hi tomaszmaciejewski,

Please open Windows PowerShell and run

(Get-WmiObject -Namespace root/WMI -ClassName WmiMonitorBrightnessMethods).WmiSetBrightness(0,80)

This command sets the brightness to 80. If this does not work, it could be a driver issue or hardware issue and you can check for the latest driver with the manufacturer. Otherwise you can try these commands to fix the issue.

sfc /scannonw
Dism /Online /Cleanup-Image /ScanHealth 
Dism /Online /Cleanup-Image /RestoreHealth

Best Regards,

Ian Xue

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