[SOLVED] Failed PCI passthrough to Windows 10

[selius.lab]

I tried GPU passthrough following the guide below but it didn’t work. https://www.reddit.com/r/homelab/comments/b5xpua/the_ultimate_beginners_guide_to_gpu_passthrough/
My PC has a Xeon2670v3 and GT1030.
The VM startup configuration is as follows
args: -cpu 'host,+kvm_pv_unhalt,+kvm_pv_eoi,hv_vendor_id=NV43FIX,kvm=off'
bios: ovmf
boot: order=ide0
cores: 16
cpu: host,hidden=1,flags=+pcid
efidisk0: local-lvm:vm-100-disk-1,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:03:00,pcie=1,romfile=1030.bin
ide0: local-lvm:vm-100-disk-0,size=320G,ssd=1
ide2: local:iso/Windows.iso,media=cdrom,size=4692672K
machine: q35
memory: 16384
meta: creation-qemu=7.1.0,ctime=1678430940
name: windows
net0: e1000=FE:84:89:E0:8A:6B,bridge=vmbr0,firewall=1
numa: 0
ostype: win10
scsi0: local:iso/virtio-win-0.1.229.iso,media=cdrom,size=522284K
scsihw: virtio-scsi-single
smbios1: uuid=8808d4c2-2f84-41af-b2ec-5d809e38b5e2
sockets: 1
tablet: 0
vga: std
vmgenid: 5f1c51ee-a16b-4378-a375-e9f28373aad0

As for the situation, when I try to install the driver a blue screen appears and it says “system thread exception not handled”. In device manager error 43 is displayed and when I try to update the driver from device manager a blue screen appears again. Can someone please help me?

 

[tiller]

Hello @selius.lab, I have the exact same issue with a 750ti. I see you flagged your post as resolved, how did you solve it?
Edit: OK, I used older drivers instead of the latest and this fixed the blue screen issue. GPU is still on error 43, but at least I can continue my investigation now
Edit2: If anybody comes here desperately looking for a solution, here was mine (after a day of work):
In BIOS, enable VT-d, IOMMU AND bar resize !
Grub:

GRUB_CMDLINE_LINUX_DEFAULT="quiet textonly crashkernel=256M nmi_watchdog=1 intel_idle.max_cstate=1 intel_iommu=on iommu=pt initcall_blacklist=sy
sfb_init"

Modprobe:

$/etc/modprobe.d|⇒  cat blacklist.conf           
blacklist radeon
blacklist nouveau
blacklist nvidia
$/etc/modprobe.d|⇒  cat vfio.conf           
options vfio-pci ids=10de:1380,10de:0fbc disable_vga=1
$/etc/modprobe.d|⇒  cat kvm.conf           
options kvm ignore_msrs=1

VM:

bios: ovmf
boot: order=scsi0;ide2;net0
cores: 8
efidisk0: local-nvme-thin:vm-105-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:01:00,pcie=1,romfile=nvidia750ti-patched.bin
ide2: nas:iso/19044.1288.211006-0501.21h2_release_svc_refresh_CLIENT_LTSC_EVAL_x64FRE_fr-fr.iso,media=cdrom,size=4803194K
machine: pc-q35-7.2
memory: 8192
meta: creation-qemu=7.2.0,ctime=1679156378
name: remote
net0: e1000=E2:CF:F1:76:7C:0B,bridge=vmbr0,firewall=1,tag=1
numa: 0
ostype: win11
scsi0: local-nvme-thin:vm-105-disk-1,iothread=1,size=150G
scsihw: virtio-scsi-single
smbios1: uuid=0f9d6aad-7487-4e28-a619-9e896e31195b
sockets: 1
vga: none
vmgenid: 7c7f8e78-b9fc-4f51-a12f-8c5802132d05

And most importantly, nvidia750ti-patched.bin being my GPU's rom retrieved with nvflash (and not cat rom) then patched with https://github.com/RecreationalGarb...blob/GUI/GPUROMPatcher/Resources/patchervb.py (using the appropriate regex taken from Form1.vbs)

And installed drivers from last december instead of latest from march to avoid blue screen