Custom DPI setting and Server 2022

Question

Hi -

We have recently migrated from Server 2016 to Server 2022 for our Citrix environment. Since the upgrade we can no longer set a custom DPI inside the Citrix session that the Server 2022 is hosting, and it have an effect.

I found another user having the same issue here: https://learn.microsoft.com/en-us/answers/questions/1158579/advanced-setting-dpi-scaling-on-server-2022-build

There was no resolution in the above thread. Any help or update would be great. Thanks.

Answer 1

Hi JereomyChapman-7182,

Thanks for your post. Based on my research, Windows Server 2022 ignores the set DPI's because the function of changing from the scaling factor for the RDP session is no longer supported on Windows Server 2022.  The reason for the different behavior in Server OS 2019 and 2022 is that different technologies were used. In Server OS 2019, icardd was used.  Icardd.dll (vdtw30.dll legacy) - Graphics redirection driver for Terminal Sever based session.  However, in 2022, icardd was no longer used and IDD was used - Indirect display driver.  Official article: https://learn.microsoft.com/en-us/windows-server/get-started/removed-deprecated-features-windows-server-2022#features-were-no-longer-developing

As a workaround, you can try to add this Regkey in:  Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm  "OverlayTestMode"=dword:00000005

Best Regards,

Ian Xue

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