So, always keep the screen at one level above the lowest one. Note: After doing this, the lowest brightness level on brightness control will turn off the screen. Restart the computer and check if you are able to adjust the brightness.Set the value to Fb20 and make sure Hexadecimal as “Base” is selected.From the right pane double-click on “ FeatureTestControl” value.In the Registry Editor navigate to the following location:Ĭomputer\HKEY_LOCAL_MACHINE\ SYSTEM\ControlSet001\Control\Class\.Type Regedit and click OK to open the Registry Editor.0xc0000221: How to Fix this Automatic Repair BSOD Error.Vb6ko.dll Could Not Be Found: How to Fix.Fix: Windows 10 brightness not working.This can help you to resolve the issue temporarily till Microsoft releases a hotfix fixing the issue.If the display adjustment problem started to occur after you upgraded to the latest version of Windows or installing a Windows update, try to install the older version of the Intel Display adapter from the official website manually. If the issue persists, and even if other solutions in this article also did not work, do the following. Restart the computer and check if you are able to adjust the screen brightness.Windows will now reinstall the driver for the Display Adapter. ![]()
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