Can not passthrough more than 8 GPUs to same VM.

[Astral1020]

Version: 7.1-4
VM OS: ubuntu 2204
I can't passthrough more than 8 GPUs to same VM.
If I passthrough 9 GPUs:

If I passthrough 10 GPUs:
nothing I can see.

 

[Dunuin]

You are running PVE7.1 and PVE7.2 increased the allowed number ob PCIe devices via GUI from 5 to 16. Not sure when the limit was increased via CLI.

Maybe you could upgrade PVE to a supported version like 7.4 and see if that helps?

 

[Astral1020]

I upgraded to 7.4-17, now I can add all PCI devices via GUI. but I still have the same issue.

 

[Astral1020]

 

[Astral1020]

https://forum.proxmox.com/threads/v...press-passthrough-gpus-only-uefi-shell.62782/
I found this.

After adding args: -device 'vfio-pci,host=d5:00.0,multifunction=on' -device 'vfio-pci,host=d6:00.0,multifunction=on' to the VM config file. I can using all gpus in same VM now.

But I wonder if there is any better solution?

 

[dcsapak]

mhmm.. can you post the output of

qm showcmd <ID> --pretty

once for the variant with all gpus in the config (like you would normally configure it)
and once for the 'args' variant?