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Brightness Slider Not Working Windows 11 Fix [2026]

AG
Againly Tech Team
April 23, 2026

Brightness Slider Not Working Windows 11 Fix [2026]

Quick Answer: Brightness not working due to missing PnP monitor driver or generic display driver. Update display adapter and monitor drivers.

Fix

Update Display Driver

Device Manager → Display adapters → Update driver

Enable Generic PnP Monitor

Device Manager → Monitors → Generic PnP Monitor → Enable if disabled

Check Power Settings

Settings → System → Display → Brightness → Ensure not set to automatic

Update Monitor Driver

Device Manager → Monitors → Generic PnP Monitor → Update driver

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Works on Windows 10 & 11 · No credit card required

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Brightness Slider Not Working Windows 11 Fix [2026] | Againly