Windows 11 NVIDIA vGPU - Error Code 43 on NVIDIA GRID RTX6000-4Q

[leonheartx1988]

Hello

I am trying to use a VGPU on a Windows 11 VM and I get Error 43 on NVIDIA GRID RTX6000-4Q Display Adapter

On an Ubuntu VM, I believe the VGPU works fine, I tried transcoding Jellyfin and I can the status with nvidia-smi

Here is my Windows VM config:

agent: 1
balloon: 0
bios: ovmf
boot: order=scsi0
cores: 4
cpu: host
efidisk0: lexar-pve:100/vm-100-disk-0.qcow2,efitype=4m,pre-enrolled-keys=1,size=528K
hostpci0: 0000:02:00.0,mdev=nvidia-257,pcie=1,x-vga=1
kvm: 1
machine: pc-q35-9.2
memory: 32768
meta: creation-qemu=9.2.0,ctime=1744789851
name: windows-11
net0: virtio=BC:24:11:16:FC:6F,bridge=vmbr0,firewall=1
numa: 0
ostype: win11
scsi0: lexar-pve:100/vm-100-disk-1.qcow2,cache=writeback,discard=on,size=1T
scsihw: virtio-scsi-pci
smbios1: uuid=a5930602-aae6-4dee-b3c1-d8e4ebcef45e
sockets: 1
tpmstate0: lexar-pve:100/vm-100-disk-2.raw,size=4M,version=v2.0
vmgenid: 1ed3ef32-01f4-4e14-be71-ffc82af18db3

Other things I tried:
- Uninstalling drivers and reinstalling.
- Providing pci_id and pci_device_id in vGPU profile_override.toml
- Providing the GPU BIOS ROM file.


Since the vGPU works on Ubuntu, then it must be something wrong with Windows

Additionally, the drivers I am installing are the Guest drivers which were included in the NVIDIA GPU Drivers Package I download and they are the version: 553.62

The guide for setting vGPU:

https://gitlab.com/polloloco/vgpu-proxmox

 

[darwood]

Think I'm in the same boat.

nvidia-smi on the host:
nvidia-smi
Fri Apr 25 01:04:56 2025
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.247.02 Driver Version: 535.247.02 CUDA Version: N/A |
|-----------------------------------------+----------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+======================+======================|
| 0 Tesla P40 On | 00000000:3B:00.0 Off | Off |
| N/A 27C P8 19W / 250W | 54MiB / 24576MiB | 0% Default |
| | | N/A |
+-----------------------------------------+----------------------+----------------------+
| 1 Tesla P40 On | 00000000:5E:00.0 Off | Off |
| N/A 27C P8 19W / 250W | 8180MiB / 24576MiB | 0% Default |
| | | N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=======================================================================================|
| 1 N/A N/A 2804 C+G vgpu 8126MiB |
+---------------------------------------------------------------------------------------+

GUEST#1 (works)
nvidia-smi on linux mint guest:
nvidia-smi
Thu Apr 24 22:02:28 2025
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.247.01 Driver Version: 535.247.01 CUDA Version: 12.2 |
|-----------------------------------------+----------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+======================+======================|
| 0 GRID P40-12Q On | 00000000:00:10.0 Off | N/A |
| N/A N/A P8 N/A / N/A | 19MiB / 12288MiB | 0% Default |
| | | Disabled |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=======================================================================================|
| 0 N/A N/A 816 G /usr/lib/xorg/Xorg 19MiB |

Guest #2 (doesn't work) Windows 11 Pro PCI.

Shows in the device manager, but fails to start. Code 43

'nvidia-smi'
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running. This can also be happening if non-NVIDIA GPU is running as primary display, and NVIDIA GPU is in WDDM mode.