Adjust screen brightness not working.

Question

I can scroll brightness, but the display is always at peak brightness.

Answer 1

I highly recommend to update display adapter.

Also, go to Control Panel > Power options > select your power plan and click Change plan settings > Change advanced power settings > Enable adaptive brightness > set it to Off for battery and plugged in.

See if it helps. 

Answer 2

Hi. I'm David, and I'm happy to help you.

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To be able to assist you better, please share a screenshot of the display adapters in Device Manager.

1. Open "Device Manager" (Windows + X and select Device Manager);
2. Expand "Display adapters" and take the screenshot.

Use the shortcut "Windows + Shift + S" to use the screenshot tool.

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Also, share a screenshot of your system information.

• Press "Windows + R", type msinfo32 and press Enter.

Maximize the window and use the screenshot tool.

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Looking forward to your reply.