nvidia gtx-950 passthrough issue

[rdmitry0911]

Hi guys, I'm trying to pass through my old nvidia gpu to debian UEFI guest. I followed this guide and card seems to be passed through (at least starting the vm doesn't produce any errors or warnings), however, after starting the VM, I see these messages in the vm console:

noueveau 0000:01:00:0: bus: MMIO write of 8000011f FAULT at 10eb14 [ PRIVRING ]
noueveau 0000:01:00:0: timer: stalled at ffffffffffffffff

and soon after that proxmox restarted
I also tried to follow this guide with the same result
My obvious question is how to fix this?

My hardware:

M/B: AsRock Z690M PG Riptide D5
CPU: Intel Core i5-12400F
RAM: 64GB (2x Kingston 32GB FURY Beast 5200MHz CL40)
nvme: Kingston NV2 SSD 2TB M.2 NVMe PCI Express 4.0 
GPU: NVIDIA GeForce GTX 950

# for d in /sys/kernel/iommu_groups/*/devices/*; do n=${d#*/iommu_groups/*}; n=${n%%/*}; printf 'IOMMU group %s ' "$n"; lspci -nns "${d##*/}"; done

IOMMU group 0 00:00.0 Host bridge [0600]: Intel Corporation Device [8086:4650] (rev 02)
IOMMU group 10 00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:7a84] (rev 11)
IOMMU group 10 00:1f.3 Audio device [0403]: Intel Corporation Device [8086:7ad0] (rev 11)
IOMMU group 10 00:1f.4 SMBus [0c05]: Intel Corporation Device [8086:7aa3] (rev 11)
IOMMU group 10 00:1f.5 Serial bus controller [0c80]: Intel Corporation Device [8086:7aa4] (rev 11)
IOMMU group 11 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM206 [GeForce GTX 950] [10de:1402] (rev a1)
IOMMU group 12 01:00.1 Audio device [0403]: NVIDIA Corporation GM206 High Definition Audio Controller [10de:0fba] (rev a1)
IOMMU group 13 02:00.0 Non-Volatile memory controller [0108]: Kingston Technology Company, Inc. Device [2646:5017] (rev 03)
IOMMU group 14 04:00.0 USB controller [0c03]: ASMedia Technology Inc. Device [1b21:3042]
IOMMU group 15 05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. Killer E3000 2.5GbE Controller [10ec:3000] (rev 06)
IOMMU group 1 00:01.0 PCI bridge [0604]: Intel Corporation Device [8086:460d] (rev 02)
IOMMU group 2 00:06.0 PCI bridge [0604]: Intel Corporation Device [8086:464d] (rev 02)
IOMMU group 3 00:14.0 USB controller [0c03]: Intel Corporation Device [8086:7ae0] (rev 11)
IOMMU group 3 00:14.2 RAM memory [0500]: Intel Corporation Device [8086:7aa7] (rev 11)
IOMMU group 4 00:15.0 Serial bus controller [0c80]: Intel Corporation Device [8086:7acc] (rev 11)
IOMMU group 5 00:16.0 Communication controller [0780]: Intel Corporation Device [8086:7ae8] (rev 11)
IOMMU group 6 00:17.0 SATA controller [0106]: Intel Corporation Device [8086:7ae2] (rev 11)
IOMMU group 7 00:1b.0 PCI bridge [0604]: Intel Corporation Device [8086:7ac4] (rev 11)
IOMMU group 8 00:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:7aba] (rev 11)
IOMMU group 9 00:1c.6 PCI bridge [0604]: Intel Corporation Device [8086:7abe] (rev 11)

# cat /proc/cmdline

BOOT_IMAGE=/vmlinuz-5.15.74-1-pve root=/dev/mapper/pve--asrock--vg-root ro net.ifnames=0 biosdevname=0 quiet intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafb:off video=efifb:off

# cat /etc/pve/qemu-server/100.conf

agent: 1
bios: ovmf
boot: order=scsi0;ide2;net0
cores: 4
cpu: host
efidisk0: local:100/vm-100-disk-0.qcow2,efitype=4m,size=528K
hostpci0: 0000:01:00,pcie=1
ide2: local:iso/debian-11.5.0-amd64-netinst.iso,media=cdrom,size=382M
machine: q35
memory: 16394
meta: creation-qemu=7.1.0,ctime=1670425305
name: Debian11
net0: virtio=FE:64:03:30:F6:50,bridge=vmbr0
numa: 0
ostype: l26
scsi0: local:100/vm-100-disk-1.qcow2,iothread=1,size=50G
scsihw: virtio-scsi-single
smbios1: uuid=bcb18044-46e3-4524-9f1e-5f3d8bcc1e26
sockets: 1
usb0: host=1c4f:0002
vga: std
vmgenid: c15d9e64-b76d-4500-bdb3-81117bee39ce

Thank you, Dmitry