OptiPlex 7480 cannot control brightness by brightness bar

Question

After upgrading to firmware ver 1.3, I am not able to set the brightness by using brightness bar. I have reinstalled the Dell OSD app already, anyone has the same issue? OS: Win10

DELL-Nat M · Answer

According to Dell-Cares, the fix is: 1. Uninstall the Dell OSD (On-Screen Display) Application:Go to Control Panel > Programs and Features >Looks for the above application. You could also check this on Windows Programs and Features page. Click on Windows > search for Programs and Features.If the OSD application is listed, uninstall it. 2. Uninstall Intel Video Driver:Go to Device Manager, expand the Display Adapter. right-click on Intel Video driver and select Uninstall. When you will get a prompt to delete the driver, click on it and proceed further. Restart the system. 3. Install the below drivers from the link:Video DriverInstall the driver and restart the system. Then install the OSD application. Restart the system and check if you can adjust the brightness on the system.

DELL-Cares · Answer

Thank you! We have received the required details. We will work towards a resolution via private messages to ensure the security of your information. In the meanwhile, you may receive assistance or suggestions from the community members as well.

DELL-Jesse L · Answer

Kevin Lo,   Try reinstalling the video card drivers in the system to see if that will resolve the issue.

DELL-Jesse L · Answer

Kevin Lo,   Let me speak to a Level 2 engineer to see if they have a fix.  I  will respond back once I hear back.

DELL-Jesse L · Answer

Kevin Lo,   .Enter the systems BIOS: i.Use the F2 boot on system startup and navigate to the System Configuration page ii.Ensure the OSD button is enabled https://dell.to/37MEauy and Exit the BIOS

Kevin Lo · Answer

I have completely uninstalled the driver of Intel UHD Graphic 630, Nvidia Geforce GTX 1650 and Dell OSD, and then reinstall then and restart. But the brightness still doesn't change when I adjust the brightness bar.

Please note that I was able to do so before (in fact I have to adjust daily day-to-night).

Kevin Lo · Answer

I am not sure that's due to the firmware upgrade recommended by 'Dell Command | Update', while the only major change I have done yesterday was upgrading firmware to ver 1.3 and I am not able to adjust the brightness afterward.

Kevin Lo · Answer

It is enable by default (unclicked), I have toggled it and restart, still the same result.

Kevin Lo · Answer

Okay, thank you!

Kevin Lo · Answer

FYI, I have downgraded the firmware to ver 1.1.1, but it still cannot solve the problem.

Alexander8503 · Answer

I have the same problem on my 7480 optiplex.. Have you found the solution?

alexstar2015 · Answer

I only have same problem of 7490AIO , you only need is  install Dell On-Screen Display Application can fix the problem

zenithtwc · Answer

I have 7480 and 7490s in the fleet and this is only option, tested with windows 11

#Powershell
$value = 50 # 1-100%
# Sets Brightness for AC
Start-Process -FilePath "powercfg.exe" -ArgumentList "-setacvalueindex SCHEME_CURRENT SUB_VIDEO VIDEONORMALLEVEL $value" -WindowStyle Hidden
# updates setting

Start-Process -FilePath "powercfg.exe" -ArgumentList "-setactive SCHEME_CURRENT" -WindowStyle Hidden

haupfear · Answer

@zenithtwc​ yours is the only solution that worked. Many thanks!

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OptiPlex 7480 cannot control brightness by brightness bar

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