Policy
Reduce display brightness (on battery)
Microsoft Windows
Policy overview
Key metadata and intent for this policy.
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.
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.
| Scope | Element | Type | Registry mapping | Constraints & behavior | Copy |
|---|---|---|---|---|---|
| Computer | Reduce Display Brightness (seconds): ID EnterDisplayDimTimeOut | decimal | Path Software\Policies\Microsoft\Power\PowerSettings\17aaa29b-8b43-4b94-aafe-35f64daaf1ee Value name DCSettingIndex Type REG_DWORD | Range: ? to 4294967295 |