I was able to fix the problem by toggling HDR off, then back on. Once this happened, the Night Light mode stayed on.
Night Light not turning on
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Matt M
0
Reputation points
Ever since the new windows update, my display settings do not allow the "Night Light" blue screen filter to come on. If I select and hold the "Strength" slider bar, the screen will apply the blue light filter as designed; however, when I release the "Strength" slider bar. The nightlight immediately turns back off. Yes, the "night light" toggle is turned on.
Windows for home | Windows 11 | Display and graphics
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AI answer
2026-08-05T14:32:56+00:00 This behavior points to a display driver problem after the Windows update. Night light is controlled by the graphics driver, and when the Night light control is grayed out or does not stay applied, updating or reinstalling the correct display driver is the supported fix.
Try these steps:
- Open Start > Settings > System > Display > Night light settings.
- Confirm Schedule night light is configured the way needed. If it is turning off unexpectedly, set custom hours or temporarily turn scheduling off to test.
- If moving the Strength slider only works while it is being held, update the display driver.
- If the PC manufacturer provides a graphics driver for the exact model, install that version first.
- If Microsoft Basic Display Adapter appears in Device Manager, the proper graphics driver is not installed. Reinstall the graphics driver from the PC manufacturer’s support site.
- Restart the PC after the driver install and test Night light again.
Important notes:
- Night light is not available on some devices that use DisplayLink or Basic Display drivers.
- If the Night light toggle is grayed out, updating the display driver is specifically recommended.
- On HDR-capable devices, if Night light turns the screen too red or unreadable, reduce the Strength slider or select Turn off now.
References:
- Change display brightness and color in Windows
- HDR settings in Windows
- Night light is no longer selectable/toggleable - Microsoft Q&A today out of the blue my pc's night light stopped working, it no longer turns on. i checked for windows updates and updated my intel display driver but it's still not working. please help!
- How to fix Brightness and Night Light not working issue on Windows 11 - Microsoft Q&A Hello
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