Help w/ Bazzite VM, Nvidia GPU Passthrough, sunshine streaming

Hi, I'm trying to get rolling with Bazzite. I've got Proxmox setup as the host, and I've got GPU passthrough working fine for Windows VM clients. The whole thing is headless and I have an HDMI dummy plug attached to the GPU. My typical workflow is to install the client operating system with a virtual display and the GPU attached (2nd display). Then I get sunshine/moonlight setup, and finally I detach the virtual display. In this case, with Bazzite using the nvidia-open variant, I'm getting black screen when streaming from the built-in sunshine.
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Metal Goose Solid
and I can have sunshine run on login and I can have the system login automatically, but removing the virtual display is also causing the system to not boot fwiw I did a workaround - instead of starting with any virtio display, I just did the normal hardware display and that worked fine. It would be nice to get an automated deployment process so I can spin up a headless bazzite VM without much hassle, but this is better than nothing.

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