Windows 10: Cannot change brightness: Get-WmiObject : Invalid class "WmiMonitorBrightnessMethods"

Hello,


I recently have vuilt my new PC and i observed that I cannot change the brightness through Windows 10. I tried many diefferent approaches to change the brightness but none is offering me an option to change the brightness. Not even the powershell --> See screenshots for the errors


My GPU is an AMD Radeon RX 5700 and the downloaded software claims that I have the most recent driver installed. The device manager claims the same.


Also, Generic PnP Minitor was enabled by default in Devicemanager.


My actual keyboard is not supporting to change the brightness via hotkey. When my new one arrivves I will try it with that one.

Right now the only possibility to change the brightness is via the AMD Software but that is not by far as smooth as by windows itself.


I really hope that you guys can help me with my problem, threads from other users could not.






[moved from German language forums]

:)

 

Unable to change brightness in Windows 10

Hi Greg,

Just as an update, I was able to install the latest Intel graphics driver for the device after uninstalling the previous one and rebooting, but the problem persisted. None of the other solutions in the articles appear to be available in the current version
of Windows, and I did not see any of those options in the corresponding settings menus. I did find one slider for brightness in Windows Mobility Center, but moving it has no effect on the screen's brightness. Other than the slider in Windows Mobility Center,
I see no other control for brightness.

I attempted this PowerShell command in both regular and admin PowerShell: (Get-WmiObject
-Namespace root/WMI
-Class
WmiMonitorBrightnessMethods).WmiSetBrightness(1,<Brightness
Level>)

It returns the following:

At line:1 char:91
+ ... root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,<20>)
+ ~
Missing expression after ','.
At line:1 char:91
+ ... root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,<20>)
+ ~
The '<' operator is reserved for future use.
At line:1 char:95
+ ... root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,<20>)
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: ) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : MissingExpressionAfterToken

 

Windows Brightness issue after the 1809 update

Ok, got it.

So in Task Scheduler the command would be:

(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,75)

OR:

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe "(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,75)"

Also since the other user suggested to create a scheduled task with the option: Select "Run whether user is logged on or not" I'm pretty much sure that Windows will ask for a password, I do not use a password with this pc, local account, no password, so
what password should I enter??

Thank you for your time.

 

Windows Brightness issue after the 1809 update

If you create Scheduler Task to reset your brightness to 100% at logon using the command below, this does work, but I have found that the brightness dims again somewhere between 10-15 minutes, so I have set the task to run every 10 minutes. Seems to be working.

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe "(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,100)"