We've noticed over the course of the past couple weeks some sporadic WVD logons exhibiting a black screen when attempting to logon from the RD client. Thirty seconds later the connection is closed. Attempting to access the VM using RDP also shows the same problem.
In the past week, however, we're now unable to provision WVD personal instances without the instances exhibiting this WVD black screen issue for each and every logon rendering the instances useless.
In researching this issue this morning I stumbled on the following thread as we have 1909 instances.
https://answers.microsoft.com/en-us/windows/forum/all/windows-10-version-1909-remote-desktop-applica...
Disabling the use of the WDDM driver via HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\fEnableWddmDriver = 0 (Dword) [aka disabling the WDDM graphics display driver for Remote Desktop Connection Group Policy setting) has resolved the issue for us, but I'm concerned that this is even required at all.
Having no previous experience using XDDM over WDDM, are there any obvious negative consequences running this configuration? Is a patch for Win10 1909 under development to address this black screen similar to this 1809 patch?
https://support.microsoft.com/en-us/help/4580390/windows-10-update-kb4580390
Improvements and fixes
- Addresses an issue that displays a black screen to Windows Virtual Desktop (WVD) users when they attempt to sign in.
