The AMD display driver is generic or corrupt after a Windows 11 update
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The Generic PnP Monitor device is disabled in Device Manager
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The Lenovo hotkey driver is missing, so the brightness keys do nothing
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An outdated BIOS is mishandling the panel brightness control
How to fix
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Reinstall the AMD Radeon display driver from Lenovo Support for V15 G4 and restart.
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Device Manager → Monitors → right-click Generic PnP Monitor → Enable if it is disabled.
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Install the Lenovo Hotkey Features Integration and Lenovo Vantage so the brightness keys work.
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Update the BIOS via Lenovo Vantage to correct panel brightness handling on the V15 G4.
“Enabling the Generic PnP Monitor and reinstalling the AMD driver got brightness control working on my V15 G4.” — Suraya, Ipoh
About the Author Ryan holds a Computer Science degree and has spent over 15 years troubleshooting Windows hardware and driver issues across major laptop brands. He writes practical, step-by-step guides for everyday users at softwaredriverdownload.com.
Frequently Asked Questions
Why will the screen brightness not adjust on Lenovo V15 G4?
If the brightness slider does nothing on the Lenovo V15 G4, the display driver is usually generic or corrupt after a Windows 11 update, so the brightness control is not wired to the panel. A disabled monitor device in Device Manager can also break brightness adjustment.
How do I fix brightness control on Lenovo V15 G4?
Reinstall the AMD Radeon display driver from Lenovo Support for V15 G4, enable the Generic PnP Monitor in Device Manager, and update the BIOS. The brightness keys and slider should work once the correct display driver is in place.
Does the monitor device affect brightness on V15 G4?
Yes. In Device Manager → Monitors, if the Generic PnP Monitor is disabled, Windows cannot adjust brightness. Right-click it and Enable, then test the brightness slider on the Lenovo V15 G4.
Why do the brightness keys not work on V15 G4?
The brightness function keys need the Lenovo hotkey driver. If they do nothing, install the Lenovo Hotkey Features Integration and Lenovo Vantage from Lenovo Support for V15 G4, then the brightness keys control the panel again.
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