Specs of machine:
Ryzen 5 1600 does not have integrated graphics. Graphics card: Nvidia NVS 310 (dual display port), only one monitor is being used.
If no monitor is connected to machine, upon starting a session you get a blank screen. If during a session and you disconnect the monitor, your screen freezes (no changes, mouse moves do not affect image).
The guest stays connected to server
On host page, In Start tab -> Update Guest info, does not change image
On host page, Running a Tool does work (rebooted machine) - Start tab updates, but session image gets to "restarting" and stays there.
Able to RDP into the machine w/o issue.
Plugging a monitor back in, immediately updates the session image and returns to normal functionality.
Unplugging the monitor re-freezes session screen image. It would appear mouse clicks do get sent to the session - in Host page, Start tab, Update Guest Info updates screen as you click, even though the session screen image is frozen.
This is a similar problem as with other AMD CPUs in the past, with integrated graphics, where if no monitors are connected, while in a session, you cannot change the resolution. It would appear related to AMD CPUs
Not sure if Guest Client software is affected.
Customer support service by UserEcho