Policy

Reduce display brightness (plugged in)

Windows 11 25H2

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Policy overview

Key metadata and intent for this policy.

ClassComputer
CategorySystem > Power Management > Video and Display Settings
Supported onAt least Windows Server 2008 R2 or Windows 7

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016

This policy setting allows you to specify the period of inactivity before Windows automatically reduces brightness of the display. If you enable this policy setting, you must provide a value, in seconds, indicating how much idle time should elapse before Windows automatically reduces the brightness of the display. Windows will only reduce the brightness of the primary display integrated into the computer. If you disable or do not configure this policy setting, users control this setting.

Internal name
DisplayDimTimeOutAC
Policy ID
4e0d68b443cd
Elements
1

Registry values

How enabled and disabled states update the registry.

No explicit registry values are set for enabled or disabled states.

Policy elements

Inputs and configuration options exposed by this policy.

ElementTypeRegistry mappingConstraints & behavior
Reduce Display Brightness (seconds):
ID EnterDisplayDimTimeOut
decimal
HKLM\Software\Policies\Microsoft\Power\PowerSettings\17aaa29b-8b43-4b94-aafe-35f64daaf1ee\ACSettingIndex
Type REG_DWORD
Range: ? to 4294967295

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