Some random notes on trying (and failing) to get Proxmox as host with 5700G APU GPU PCI Passthrough to Ubuntu guest VM working:

References:

• Looks like this one claims to have this working (but I have not tested the method) :
  • https://forums.unraid.net/topic/112649-amd-apu-ryzen-5700g-igpu-passthrough-on-692/page/6/#comment-1134140
• Others trying to get this working:
  • https://forum.proxmox.com/threads/amd-ryzen-7-renoir-4750g-apu-and-igpu-pass-thru-to-windows-10-guest.84849/
  • https://forums.unraid.net/topic/112649-amd-apu-ryzen-5700g-igpu-passthrough-on-692/
  • https://forums.unraid.net/topic/100729-help-requested-for-amd-ryzen-5-pro-4650g-passthrough/
• https://forum.level1techs.com/t/got-my-ryzen-4750g-apu-igpu-to-pass-through-to-qemu-kvm-vm-but-display-output-is-pixelated-garbage-after-amd-apu-radeon-driver-install-from-amd-or-windows-update/169903