Proxmox 8 beta breaks Windows GPU passthrough, host crashes


May 16, 2023
After installing the 8 beta, my Windows 10 VM with GPU passthrough no longer runs, and always crashes the entire node.

Same with a Win 11 VM. Both do work without PCI (GPU) passthrough. GPU passthrough does sort of work in Linux guests (PopOS), but usually after logging in, screen blanks and stays blank. This worked before. Linux guests do not crash the system, Windows guests do.

Host does not crash when there's no "
x-igd-opregion=on" in the VM conf args but then again, no image

this is the config of the Win10 guest:
agent: 1
args: -device vfio-pci,host=00:02.0,romfile=/etc/pve/qemu-server/i915ovmf.rom,x-igd-opregion=on
balloon: 0
bios: ovmf
boot: order=sata0;ide2;net0
cores: 2
cpu: host,hidden=1
efidisk0: storage:vm-102-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:1f.3
ide2: none,media=cdrom
machine: pc-q35-7.2
memory: 4096
meta: creation-qemu=7.2.0,ctime=1684587351
name: win10
net0: e1000=96:B3:46:FA:0C:EA,bridge=vmbr0,firewall=1
numa: 0
ostype: win10
parent: all_working
sata0: storage:vm-102-disk-2,backup=0,discard=on,replicate=0,size=128G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=98aed783-45fe-4ff4-a508-e417b4d3108c
sockets: 1
spice_enhancements: foldersharing=1
tablet: 0
tags: windows
vga: none
vmgenid: 33ad5816-0574-4e7e-82f1-16aa982055ef
vmstatestorage: storage

this is my grub:
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt initcall_blacklist=sysfb_init"

my etc/modprobe.d/vfio.conf (GPU and audio, they are in separate IOMMU groups, GPU is in its group by itself)
options vfio-pci ids=8086:5916,8086:9d71
Last edited:
Since I asked in another thread, I'll ask here as well: do you know if there's a bug report for that?


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