iGPU passthrough fully works in Ubuntu, works but no actual HDMI output in Windows

[stooovie]

Proxmox 7.4-3, i5 7200U with Intel HD Graphics 620 (no other GPU). I am able to fully use the iGPU in ubuntu 20.04 - both HW acceleration and HDMI output work as expected.

In Windows 10 (fully updated), I can get HW acceleration, the Intel driver is recognized and loaded, BUT I'm getting no actual display over HDMI. No combination of All functions, Primary GPU and PCI-Express doesn't seem to fix this.

Any tips or pointers? Thanks!

Here's the Windows VM cfg:
agent: 1
args: -cpu 'host,+kvm_pv_unhalt,+kvm_pv_eoi,hv_vendor_id=NV43FIX,kvm=off'
balloon: 0
bios: ovmf
boot: order=sata0;ide2;net0
cores: 2
cpu: host,hidden=1
cpuunits: 100
efidisk0: storage:vm-102-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:02,pcie=1,x-vga=1
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
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
usb0: host=046a:0001
vmgenid: 33ad5816-0574-4e7e-82f1-16aa982055ef
vmstatestorage: storage

 

[juxdun]

I'm in the same situation. Proxmox 7.4-3, kernel 6.2.6-1-pve, i5 6500 with Intel HD Graphics 530 (no other GPU).
HDMI output works fine on Ubuntu 22.04.
In Windows 10 (22h2) , the Intel driver is recognized and loaded, BUT I'm getting no actual display over HDMI.
Wait for someone to fix it.

 

[ccj47]

Any update to passthrough Intel iGPU to Windows 10/11 with HDMI out working?

 

[stooovie]

I was able to get HDMI out and acceleration fully working with this in my VM conf:

args: -device vfio-pci,host=00:02.0,romfile=/etc/pve/qemu-server/i915ovmf.rom,x-igd-opregion=on

But that stopped working after upgrading to Proxmox 8. It crashes the entire host immediately every time.

 

[dextersnp]

How did you get hdmi output in Ubuntu? Here, after the Ubuntu vm goes up, I have no image, just “no signal” on the monitor

 

[fer.bondan]

I was able to get HDMI out and acceleration fully working with this in my VM conf:

args: -device vfio-pci,host=00:02.0,romfile=/etc/pve/qemu-server/i915ovmf.rom,x-igd-opregion=on

But that stopped working after upgrading to Proxmox 8. It crashes the entire host immediately every time.

Did you able to passthrough Intel iGPU to Windows 10/11 with display over HDMI?

 

[wrobelda]

I was able to get HDMI out and acceleration fully working with this in my VM conf:

args: -device vfio-pci,host=00:02.0,romfile=/etc/pve/qemu-server/i915ovmf.rom,x-igd-opregion=on

But that stopped working after upgrading to Proxmox 8. It crashes the entire host immediately every time.

Do you know if there's a relevant bug report for that?

 

[HariSeldon]

Do you know if there's a relevant bug report for that?

Same here happening to me.

Wrote my feedback in this thread:
intel-uh630-igp-passthrough-and-hdmi-output-to-host-screen

with Proxmox 8 is impossibile to have hdmi out from igpu passtrough, even if the passthrough works correctly!

 

[HariSeldon]

Do you know if there's a relevant bug report for that?

so at the end the issue it was the machine configuration!
Switching from q35 to i440fx (vm linux guest) everything is working!

 

[Minionguyjpro]

Any news on this? I can't even get the HD 620 GPU to work on Windows, it just throws code 43. Linux works fine, I tried it in a Fedora VM on which it gave output on HDMI (but no hardware acceleration, but I probably didn't have the drivers for that installed).