[SOLVED] Proxmox PCI-E Passthrough | Single GPU Config | HP640 - Xeon & Quadro

[LocalUser]

Hi,

I'm using an HP640 Workstation with,
CPU: Intel Xeon E5-2650 v4
RAM: 32GB
GPU: Quadro K2200

However, I can't seem to get the past "Code 43".

Do I need a GPU for the host? Is that where it falls apart for me...

Spoiler: [B]/etc/default/grub[/B]

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Proxmox Virtual Environment"
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt vfio_iommu_type1.allow_unsafe_interrupts=1 pcie_acs_override=downstream video=efifb:off,vesafb:off"
GRUB_CMDLINE_LINUX=""
GRUB_DISABLE_OS_PROBER=true

Spoiler: [B]/etc/modules[/B]

vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

Spoiler: [B]/etc/modprobe.d/blacklist.conf[/B]

blacklist radeon
blacklist nouveau
blacklist nvidia
blacklist nvidiafb

Spoiler: [B]/etc/modprobe.d/pve-blacklist.conf[/B]

blacklist nvidiafb

/etc/modprobe.d/vfio.conf

# options vfio-pci ids=10de:13ba,10de:0fbc disable_vga=1

Spoiler: [B]VM config:[/B]

args: -machine max-ram-below-4g=1G,kernel_irqchip=on -cpu host,kvm=off
balloon: 0
boot: order=ide0;ide2;net0
cores: 8
cpu: host,hv-vendor-id=HPZ640
hostpci0: 02:00,pcie=1,x-vga=1
ide0: VMs1:vm-100-disk-0,size=32G
ide2:
machine: pc-q35-5.2
memory: 16384
name: Win10
net0: e1000=96:8A:D1:D6:05:87,bridge=vmbr0,firewall=1
numa: 0
ostype: win10
scsihw: virtio-scsi-pci
smbios1: uuid=0af6bb74-4223-4e12-9672-3bae9cece8cb
sockets: 1
unused0: VMs1:vm-100-disk-1
vmgenid: 57f3f16f-5192-410a-a9e1-d74647adedf7

update-grub
update-initramfs -u
reboot


Adding "pc" to args: -machine as stated in the tutorial yields the following error.
kvm:/usr/share/qemu-server/pve-q35-4.0.cfg:1: Bus 'pcie.0' not found
TASK ERROR: start failed: QEMU exited with code 1

removing pc makes it bootable, with "Code 43".

Without commenting out vfio.conf the following error arises,
kvm: -device vfio-pci,host=0000:02:00.0,id=hostpci0.0,bus=ich9-pcie-port-1,addr=0x0.0,x-vga=on,multifunction=on: vfio 0000:02:00.0: failed getting region info for VGA region index 8: Invalid argument
device does not support requested feature x-vga


I might be missing something trivial, this is the first time I use Proxmox as well as try passing a GPU to a VM. Proxmox seems to be super-efficient though, so I'd appreciate the function of GPU passthrough.

 

[LocalUser]

Solved Code 43 by changing "video=efifbff,vesafbff" to "video=efifbff video=vesafbff" in /etc/default/grub

Solving Code 43 lead to another problem... The RDP graphics broke, however, it was still working on a local screen.

For RDP to work properly in Windows 10 Guest OS a change in Remote Desktop Services had to be done:
[Local Group Policy Editor->Local Computer Policy->Administrative Templates->Windows Components->Remote Desktop Services->Remote Desktop Session Host->Remote Session Enviroment], set the Policy [Use WDDM graphics display driver for Remote Desktop Connections] to Disabled.

Reference thread: Quadro GPU Passthrough to Windows shows code 43

Thanks to @avw for pointing me in the right direction.