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Single pcie passthrough for rx6800 gpu

Good day, I have some really hard time getting my GPU passed through to a VM, my current host is Linux Mint 21.1. The bios setting is fine, but for some reason I get a black screen every time the VM starts. I have narrowed it down to the startup hook script, where it is stuck (meaning it wont do the following) when it is doing the ‘virsh nodedev-detach’ instruction.

virsh nodedev-detach pci_0000_09_00_0 virsh nodedev-detach pci_0000_09_00_1

Following the instructions of the following link: https://www.reddit.com/r/VFIO/comments/n35k69/successful_6800_xt_passthrough_are_such_posts/

I’m not sure if the card itself have limitations, or is it LM. Just want to confirm whether I am wasting my time on this card? Or if it is the combination of both Linux and my GPU I’m basically try to do a single GPU pass-through with scripts that will release GPU from host and pass through to VM, till the VM is shut down, then the host have control over the GPU again.

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