@thefrisianclause

Nice to see a bit of action in this thread after a few weeks. It seems both of use are using Ivy Bridge CPU's, I wonder if the issue is related to our CPU's or chipsets?

I notice in the Reddit thread you posted it mentions something about the E3-12xx CPU's:

IMPORTANT ADDITIONAL COMMANDS
You might need to add additional commands to this line, if the passthrough ends up failing. For example, if you're using a similar CPU as I am (Xeon E3-12xx series), which has horrible IOMMU grouping capabilities, and/or you are trying to passthrough a single GPU.
These additional commands essentially tell Proxmox not to utilize the GPUs present for itself, as well as helping to split each PCI device into its own IOMMU group. This is important because, if you try to use a GPU in say, IOMMU group 1, and group 1 also has your CPU grouped together for example, then your GPU passthrough will fail.

Is it possible that same GRUB config is required here? Sorry, I'm probably not much help when it comes to hardware troubleshooting on Linux.

GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafb:off,efifb:off"

I don't have the faintest idea of what any of this does or if it could help.

Hi all, I'm hoping someone can help me.

Hardware specs:

• ASUS P8B WS
• Xeon E3-1230 v2
• 10GB ECC RAM
• Haupagge WinTV QuadHD (TV Tuner)
• Nvidia Quadro P400

VM: Ubuntu Server 20.04 LTS

What I was hoping to do was use PCI/GPU passthrough to pass through the GPU and TV Tuner to a Ubuntu server running Plex media server. I was able to get the TV tuner working and it could scan channels, etc, and the GPU was also detected by Ubuntu, however no matter what I did I could not get the latest Nvidia drivers working and some of the hardware details aren't complete.

I tried installing from the official Ubuntu PPA, the Nvidia PPA, I tried upgrading Ubuntu to the latest release 21.10. I tried 21.04. I tried the 20.04 LTS version. I tried older drivers like 430, 450, 460, 465 and 470 and no matter what I did I could not get the GPU to function correctly through XCP-NG.

I know there's no hardware problem as I have pretty much given up and it's currently doing hardware transcoding just fine on a Ubuntu 20.04 install on bare metal.

I'd be willing to give XCP-NG one last try if anyone can give me any suggestions as what could be wrong.

I'm not sure if it's the same thing, but I tried both passing through the PCI devices in the CLI as well as trying the method of selecting the Nvidia GPU from the list in XOA after I had disabled the GPU from the hypervisor. Neither method worked. I also tried assigning the GPU through XCP-NG center Windows program.

This screenshot shows a few different commands. You can see the error messages in dmesg as well as the GPU UUID and Video BIOS appear as blank when inspecting the device information under /proc.