Unable to change screen brightness - issue caused by Impero [Fix]

[Cat_Jam148]

Hi guys

 

Wondering if any of you would be able to point me in the right direction regarding this odd issue affecting screen brightness control on a freshly imaged 1809 edu laptop?

 

So after getting all the drivers installed, the brightness control is working fine - button appearing in the notification centre and fn keys work. After being added to the domain, the button disappears and the fn keys no longer work...and as far as i'm aware there are no GPOs which should be altering the brightness control.

 

Night light option is there but no brightness control. Doesn't seem to be affected by the user account either - admin or staff, the result is still the same

 

Any ideas?

Edited January 25, 2023 by elsiegee40

[CHiLL]

Have you tried placing the machine & user in OUs that definitely have no GPOs applied?

[Cat_Jam148]

Have you tried placing the machine & user in OUs that definitely have no GPOs applied?

 

Managed to finally devote a little time to it yesterday and found out that Impero is the culprit. Turns out it installs a secondary graphics driver called DPMS Monitor which is part of the function to blank the screen.

 

Fix is below for anyone who might need it - It does disable the blank screen function on the machine its applied to.

 

64bit Reg Key (x64)

 

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Impero Solutions Ltd\ImperoV3

 

32bit Reg Key (x86)

 

HKEY_LOCAL_MACHINE\SOFTWARE\Impero Solutions Ltd\ImperoV3

 

Now add the following String Value:

 

DPMSBlanking

 

Right click and Modify value data to the following:

 

Disabled

 

 

Adding these Reg Keys will disable the new display driver

 

The above will only take effect after the machine is restarted a few times

 

[jonahmt21]

 

Managed to finally devote a little time to it yesterday and found out that Impero is the culprit. Turns out it installs a secondary graphics driver called DPMS Monitor which is part of the function to blank the screen.

 

Fix is below for anyone who might need it - It does disable the blank screen function on the machine its applied to.

 

64bit Reg Key (x64)

 

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Impero Solutions Ltd\ImperoV3

 

32bit Reg Key (x86)

 

HKEY_LOCAL_MACHINE\SOFTWARE\Impero Solutions Ltd\ImperoV3

 

Now add the following String Value:

 

DPMSBlanking

 

Right click and Modify value data to the following:

 

Disabled

 

 

Adding these Reg Keys will disable the new display driver

 

The above will only take effect after the machine is restarted a few times

 

 

What do you mean restart a few times? how many times do we have to restart for this to take effect? thanks

[superaz300]

Sorry to bump an old thread, however I just wanted to say a massive thank you to your post sir! I have been for weeks trying to workout why our new staff HP laptops could not change the screen brightness, I even involved HP Support because I thought this was driver related. As soon as I added the registry keys and rebooted, boom we could change the brightness.

 

Never thought of Impero at all! If anything, I thought this was our Group Policy.

 

Thank you once again

James

 

 

Managed to finally devote a little time to it yesterday and found out that Impero is the culprit. Turns out it installs a secondary graphics driver called DPMS Monitor which is part of the function to blank the screen.

 

Fix is below for anyone who might need it - It does disable the blank screen function on the machine its applied to.

 

64bit Reg Key (x64)

 

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Impero Solutions Ltd\ImperoV3

 

32bit Reg Key (x86)

 

HKEY_LOCAL_MACHINE\SOFTWARE\Impero Solutions Ltd\ImperoV3

 

Now add the following String Value:

 

DPMSBlanking

 

Right click and Modify value data to the following:

 

Disabled

 

 

Adding these Reg Keys will disable the new display driver

 

The above will only take effect after the machine is restarted a few times

 

[Cat_Jam148]

No problem - glad it helped somebody.

[QwertyMash]

Hello,

 

We have been looking into this brightness issue and just stumbled upon this post and tried out the keys and that was the solution for us as well - pushing them out via GPO now.

 

Just wanted to say thank you.

[mikes]

Looks like we had this too with Lenovo laptops - I'd install the driver and it would work for a bit but then the laptops would stop allowing brightness changes! sounds like a bug Impero should be able to fix ?

[Cat_Jam148]

Looks like we had this too with Lenovo laptops - I'd install the driver and it would work for a bit but then the laptops would stop allowing brightness changes! sounds like a bug Impero should be able to fix ?

 

Haha, very little chance of that. I reported this to Impero back in 2019...

 

Looks like you guys are still having the problem, so obviously they've not been too fussed

Edited January 18, 2023 by Cat_Jam148

[Surfing_Storms]

Thanks for your help! I was really scratching my head at this