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Single pcie passthrough for rx6800 gpu (programming.dev)

submitted 1 year ago by [email protected] to c/[email protected]

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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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[–] [email protected] 2 points 1 year ago* (last edited 1 year ago) (2 children)

You have one GPU card? If yes you need some additional hooks (kill DE sessions, stop X, etc). Look here: https://github.com/joeknock90/Single-GPU-Passthrough .

UPD: Sorry. I read the reddit post. So you pass through single GPU. You load GPU bios when Windows load?

In general, such a configuration will be quite complicated, but if you want to try, show the VM configuration and the start hook. Without this not easy to say.

[–] [email protected] 1 points 1 year ago

"UPD: Sorry. I read the reddit post. So you pass through single GPU. You load GPU bios when Windows load?"

I haven't done that. I was of opinion that the radeon rx6800 didn't need it as nvidia does. Will download a bios and load it with the Vm.

"In general, such a configuration will be quite complicated, but if you want to try, show the VM configuration and the start hook. Without this not easy to say."

I reverted back to pre-virtmanager installation, will try this evening to follow the steps, including adding the bios to the VM, will also post the configurations and hooks. Will appreciate it if I don't need to dual boot anymore, having snapshot of my windows VM will be of great value for my workflow

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago)

"UPD: Sorry. I read the reddit post. So you pass through single GPU. You load GPU bios when Windows load?"

I haven't done that. I was of opinion that the radeon rx6800 didn't need it as nvidia does. Will download a bios and load it with the Vm.

"In general, such a configuration will be quite complicated, but if you want to try, show the VM configuration and the start hook. Without this not easy to say."

I reverted back to pre-virtmanager installation, will try this evening to follow the steps, including adding the bios to the VM, will also post the configurations and hooks. Will appreciate it if I don't need to dual boot anymore, having snapshot of my windows VM will be of great value for my workflow

[–] ZachAR3 1 points 1 year ago

Not sure about your issues but I was able to do single gpu pass through in Nvidia with this guide which seems to show amd as well https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/home

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