Step 1: Go to Device Manager via the Win + X menu. To help you out, go to update the GPU drivers. Outdated graphics card drivers can lead to Windows 11 brightness not working or Windows 11 brightness slider missing.
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Then, Windows will install the driver successfully. Click Browse my computer for drivers > Let me pick from a list of available drivers on my computer, choose Generic PnP Monitor, and click Next.
Right-click this monitor and choose Update driver. In addition to disabling and enabling the Generic PnP monitor driver, you can choose to update the driver to fix your Windows 11 brightness issue. Step 3: Click Action at the top menu and choose Scan for hardware changes. Step 2: Expand Monitors, right-click on the Generic PnP Monitor and check if it is enabled. Step 1: Right-click the Start button and choose Device Manager. Related article: Fix Generic PnP Monitor Issue in Windows 10 So, you can also have a try by following the steps below. According to users, this way is useful to fix the issue of brightness not working like Windows 11 brightness control not working, Windows 11 brightness slider missing, etc. PnP stands for the plug-and-play hardware device. Solutions to Windows 11 Brightness Not Working Disable/Enable Generic PnP Monitor or Update Driver If you run into one of the above situations, how can you fix the Windows 11 brightness issue? Move to the next part to look for some solutions.