Issue with Landscape+portrait monitors in Windows 11

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This discussion was created from comments split from: TeamViewer and Windows 11 (21H2) Update.

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JimE111

Sooooooooooo helpful!! This has been broken for me for months (ever since upgrading to Win11)!

Workaround fixed it! Thank you!!!

DrSuSE

Edit... never mind, it did. Restarting the teamviewer service didn't seem to work, but rebooting did.

DrSuSE

I am not the original reporter, but I am having the same issue and the registry adjustment did not resolve it.

AlenaC

Thank you for your comment and raising this topic @SoxPP 😊

Welcome to our community!

Our dedicated team was able to test it and reached out to Microsoft.

Update from Microsoft: The fix is part of the Windows 11 insider build 22526 released at the start of January.

As a workaround the customer should disable Duplication API for now:

👉️On the remote machine create a new registry value under HKEY_LOCAL_MACHINE\SOFTWARE(\Wow6432Node)\TeamViewer with the name "DisableDuplicationAPI" as a DWORD value and set it to 1.

👉️You'll have to restart the TeamViewer service to activate that setting.

Let me know if this has helped 😃

Best,

Alena

SoxPP

I am a developer and my development setup (that I need to remote into when working from home) has 2 x landscape monitors and 1 x portrait monitor. My PC used to be Windows 7 and this all worked fine through Teamviewer.

I have now replaced that Windows 7 PC with a new PC which is running Windows 11. I find that when I remote in, the portrait monitor only shows a black screen. If I make this the only monitor then it is ok. It seems to be when I have a mix of monitors at different orientations that I have a problem. So it was fine when the client was Win 7 but not when it is Win 11.

My local PC (connecting from) in Windows 10 and is running Teamviewer 15.26.4

My remote Windows 11 PC is also running Teamviewer 15.26.4, an dis up to date with all the latest Window updates and graphics drivers (NVidia GeForce GTX 1660 Super).

In trying to resolve my problem by Googling this, I have tried disabling UDP support and also hardware acceleration, but neither of these helped.

My conclusions is that this is a compatibility problem between Windows 11 and Teamviewer. Where you aware of this, and is there a fix on the roadmap?

Thanks