iGPU in LXC is "UNCLAIMED"

[jaronp]

Hi I have setup Proxmox on a recently built server. Rough specs are as follows:

Motherboard: ASRock B550M Pro
CPU: AMD Ryzen 7 5700G (the iGPU)
GPU: NVIDIA 3050 Ti

the output of lshw -c video is:

*-display
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: /dev/fb0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=nouveau latency=0 resolution=1920,1080
       resources: irq:79 memory:fb000000-fbffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:f000(size=128) memory:c0000-dffff
  *-display UNCLAIMED
       description: VGA compatible controller
       product: Cezanne
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:06:00.0
       version: c8
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix vga_controller cap_list
       configuration: latency=0
       resources: memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:d000(size=256) memory:fc500000-fc57ffff

I'm encountering this issue because I am trying to enable hardware accelerated transcoding on my Jellyfin instance running in an LXC (partially) using this guide.

There is nothing plugged into the display outputs of the motherboard or GPU. On a previous install I attempted to change a BIOS setting the make the iGPU the primary video adaptor but found a black screen on boot. I think this was because there is a separate setting to enable the iGPU as well but to be completely honest I'm afraid to re-enable it at the moment.

Before I do something silly again does anyone have some idea as to what I'm doing wrong or where I should be troubleshooting? Thank you in advance.