VM GPU Passthrough not working Help

[Manuel222]

I Have The Problem of Having 2 Nvidia gpus in my system with one of them I want to passthrough I have already blacklisted the driver but after starting Proxmox the driver is there to be seen again I would love to run Proxmox headless but I don't know how to prevent my GPUs to be attached to Proxmox or can I just detach one with a grub setting or something ?


kvm: -device vfio-pci,host=0000:05:00.0,id=hostpci1.0,bus=ich9-pcie-port-2,addr=0x0.0,multifunction=on: vfio 0000:05:00.0: device is already attached TASK ERROR: start failed: QEMU exited with code 1

 

[kromberg]

It is not possible to have two GPUs that use the same driver to have one be a pass through and the other the host main GPU.

 

[leesteken]

Can you show the VM configuration file (from the /etc/pve/qemu-server/ directory)? I suspect that there are two very similar hostpci lines.
Don't passthrough 05:00.0 and 05:00.1 and use All Functions on both. Just passthrough 05:00.0 with All Functions, and the other functions (like 05:00.1) will also be passed through.