To quote the community description
This is a community for discussing things about programming.dev itself.
So you'd probably have better luck posting in a community directly related to your question. Maybe try /c/operating_systems@beehaw.org
Regarding your issue, looking on L1 forums it appears that while some people have had similar issues while not exactly in the same scenario, it does appear possible to get PCIE pass-through to work with a rx6800 GPU.
While these links may not directly correlate, potentially something in these links may help to solve your issue:
- https://forum.level1techs.com/t/6800xt-reference-single-gpu-passthrough-no-signal/180289
- https://forum.level1techs.com/t/rx-6800-xt-passthrough-card-boot-looping-after-installing-radeon-drivers-on-guest/179074
- https://forum.level1techs.com/t/silverblue-vfio-on-x570-w6600-6800xt/176126
- https://forum.level1techs.com/t/radeon-rx-6800-xt-gpu-passthrough-virtio/173453/2