Windows 11: Laptop Brightness Dims when I Connect/Disconnect External Monitor

Hi Laster. I'm Greg, 10 years awarded Windows MVP, specializing in Installation, Performance, Troubleshooting and Activation, here to help you.

1) Try these fixes for known issue of screen dimming in WIndows 11:

https://www.groovypost.com/howto/turn-off-or-ma...

https://windowsreport.com/windows-11-screen-dim...
(Avoid ad links which intrude into editorial copy, especially avoid Restoro, PC Repair Tool and Reimage ads

http://woshub.com/fix-windows-10-screen-brightn...

https://answers.microsoft.com/en-us/windows/for...

https://www.reddit.com/r/Windows11/comments/ra4...

https://www.reddit.com/r/windowsinsiders/commen...

https://www.youtube.com/watch?v=cPUqTnTbxOE&...

https://www.youtube.com/watch?v=7b7erMMyj7Y

2) The Display driver is so important here that merely updating it is sometimes not enough. So let's try everything possible to get it working correctly:

First make sure you have updated the Display driver from the PC or Display adapter maker's Support Downloads web page for your exact model number, HP Serial Number or Dell Service Tag - from the sticker on the PC.

While there check also for newer chipset, BIOS/UEFI firmware (very important), network, sound, USB3 and other drivers, comparing to the ones presently installed in Device Manager reached by right clicking the Start Menu.

Remove the old driver using DDU https://www.wagnardsoft.com/content/ddu-guide-t... if necessary installing in Safe Mode with Networking (so you have internet), or Safe Mode, accessed by one of these methods: https://winaero.com/how-to-boot-windows-11-in-s...

If this doesn't give you the latest or ideal driver for what you need, compare it to the driver offered by the Intel driver update Utility here: https://www.intel.com/content/www/us/en/support...

or the Nvidia GeForce scanner here: http://www.nvidia.com/Download/Scan.aspx?lang=e...

or the AMD autodect utility here: http://support.amd.com/us/gpudownload/windows/P...

For Display issues one fix that is working is to Roll back or Uninstall the Driver on the Display Device > Driver tab, restart PC to reinstall driver. You can also try older drivers in Device Manager > Display device > Driver tab > Update Driver > Browse > Let Me Pick.

Then you will know you've tried everything in addition to Windows Update drivers.

Adjust the screen resolution until it fits and looks best at Settings > System > Display.

3) Expedite Windows Updates to see if a monitor driver arrives, possibly under Optional Updates.

Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.

______________________________________________

Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.

Hi Laster. I'm Greg, 10 years awarded Windows MVP, specializing in Installation, Performance, Troubleshooting and Activation, here to help you.

1) Try these fixes for known issue of screen dimming in WIndows 11:

https://www.groovypost.com/howto/turn-off-or-ma...

https://windowsreport.com/windows-11-screen-dim...
(Avoid ad links which intrude into editorial copy, especially avoid Restoro, PC Repair Tool and Reimage ads

http://woshub.com/fix-windows-10-screen-brightn...

https://answers.microsoft.com/en-us/windows/for...

https://www.reddit.com/r/Windows11/comments/ra4...

https://www.reddit.com/r/windowsinsiders/commen...

https://www.youtube.com/watch?v=cPUqTnTbxOE&...

https://www.youtube.com/watch?v=7b7erMMyj7Y

2) The Display driver is so important here that merely updating it is sometimes not enough. So let's try everything possible to get it working correctly:

First make sure you have updated the Display driver from the PC or Display adapter maker's Support Downloads web page for your exact model number, HP Serial Number or Dell Service Tag - from the sticker on the PC.

While there check also for newer chipset, BIOS/UEFI firmware (very important), network, sound, USB3 and other drivers, comparing to the ones presently installed in Device Manager reached by right clicking the Start Menu.

Remove the old driver using DDU https://www.wagnardsoft.com/content/ddu-guide-t... if necessary installing in Safe Mode with Networking (so you have internet), or Safe Mode, accessed by one of these methods: https://winaero.com/how-to-boot-windows-11-in-s...

If this doesn't give you the latest or ideal driver for what you need, compare it to the driver offered by the Intel driver update Utility here: https://www.intel.com/content/www/us/en/support...

or the Nvidia GeForce scanner here: http://www.nvidia.com/Download/Scan.aspx?lang=e...

or the AMD autodect utility here: http://support.amd.com/us/gpudownload/windows/P...

For Display issues one fix that is working is to Roll back or Uninstall the Driver on the Display Device > Driver tab, restart PC to reinstall driver. You can also try older drivers in Device Manager > Display device > Driver tab > Update Driver > Browse > Let Me Pick.

Then you will know you've tried everything in addition to Windows Update drivers.

Adjust the screen resolution until it fits and looks best at Settings > System > Display.

3) Expedite Windows Updates to see if a monitor driver arrives, possibly under Optional Updates.

Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.

______________________________________________

Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.

I have tried all of these suggestions and still have the same issue. The brightness just keeps defaulting to whatever brightness the computer was at when it booted up, whenever I connected an external monitor.

Just a note, I went back to Windows 10 and there was no issue with the brightness changing whenever I connected an external monitor, so I believe this is a Windows 11 issue. I waited for a bit for the cumulative updates to come out, but Microsoft has not yet fixed the issue.

Any suggestions?