Hi cjnot,

I know it way too late to replay to your question but I thought may other benefit from my answer.

I convert my PC at home to a server and installed ESXI 7.0 U2.

I have single AMD GPU in the server.  The AMD GPU was exhibiting the symptom noted in the link you provided but when I move the host display to motherboard HDMI the AMD GPU stayed active after rebooting.

Now I'm trying to get display from Mac OS guest through the GPU.

which me luck