Laptop screen brightness not adjustable
4.5
The brightness slider or hotkeys do not change the screen intensity.
Symptoms
- Stuck at 100%
- Slider missing
- Hotkeys do nothing
Possible Causes
- Generic PnP monitor driver
- TeamViewer/Remote software
- BIOS bug
Step-by-Step Fix
1
Update Monitor Driver
Ensure "Generic PnP Monitor" is enabled in Device Manager.
2
Disable Adaptive Brightness
Turn off auto-brightness in power settings.
3
Reinstall Graphics Driver
Brightness control is handled by the GPU driver.
When to See a Technician
Some remote desktop apps install a virtual monitor driver that breaks brightness control.
Rate this Fix
0 / 5(0 ratings)
Comments (0)
No comments yet. Be the first to share!