GPU Passthrough not working in 6.2

[Okeur75]

Oh boy here we go again !!!

Hello all,

Same as : here but this time the VM is a Linux (GPU is Nvidia)

GPU passthrough was working in 6.1 but not anymore in 6.2. I'm greeted with the error message "device does not support requested feature x-vga ".
And I can't boot without the x-vga otherwise inside the VM I can't use the GPU, nvidia-smi returns "Unable to determine the device handle for GPU ... : Unkown error"

Some logs/ouputs:

root@pve:~# cat /etc/modprobe.d/pve-blacklist.conf
blacklist nvidiafb
blacklist nouveau

root@pve:~# cat /etc/pve/qemu-server/100.conf
agent: 1
bios: seabios
bootdisk: scsi0
cores: 1
hostpci0: 43:00,pcie=1,romfile=1050.bin,x-vga=1
machine: q35
memory: 1024
name: Emby
net0: virtio=52:2F:E2:C0:6B:D2,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: VM-OS:vm-100-disk-0,size=32G
scsihw: virtio-scsi-pci
smbios1: uuid=d974b174-48cb-4c54-aab4-64e14020723c
sockets: 1
unused0: VM-OS:vm-100-disk-1
vmgenid: b31f8de9-538e-4fa8-a3c4-baff2e017a3a

root@pve:~# cat /etc/modprobe.d/vfio.conf
options vfio-pci ids=10de:1c81,10de:0fb9 disable_vga=1

root@pve:~# lspci -nnk
43:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP107 [GeForce GTX 1050] [10de:1c81] (rev a1)
        Subsystem: Gigabyte Technology Co., Ltd GP107 [GeForce GTX 1050] [1458:3766]
        Kernel driver in use: vfio-pci
        Kernel modules: nvidiafb, nouveau
43:00.1 Audio device [0403]: NVIDIA Corporation GP107GL High Definition Audio Controller [10de:0fb9] (rev a1)
        Subsystem: Gigabyte Technology Co., Ltd GP107GL High Definition Audio Controller [1458:3766]
        Kernel driver in use: vfio-pci
        Kernel modules: snd_hda_intel

And the full error output I'm greeted with.

kvm: -device vfio-pci,host=0000:43:00.0,id=hostpci0.0,bus=ich9-pcie-port-1,addr=0x0.0,x-vga=on,multifunction=on,romfile=/usr/share/kvm/1050.bin: vfio 0000:43:00.0: failed getting region info for VGA region index 8: Invalid argument
device does not support requested feature x-vga
TASK ERROR: start failed: QEMU exited with code 1

So goal is to understand what has changed between 6.1 and 6.2 and update the conf accordingly to make it work.

If anyone has any idea !

 

[r.jochum]

Try to install another Winbox and use OVMF with it, my 1050 works well (its a ZOTAC).

 

[Okeur75]

Yes but I'm using Linux, not Windows though.
And I don't want to have to install a new VM each time I upgrade proxmox for a minor release...

 

[r.jochum]

Why do you have to install a new VM when you use OVMF?

 

[Okeur75]

Because VM hangs at boot when I switch it from Seabios to OVMF with an EFI disk

 

[Okeur75]

So recreating a Linux VM with native OVMF worked.
But it's not the point here, I would like to understand what happened because of the upgrade, because I'm not recreating a VM each time there is a minor upgrade.