iGPU passthrough hdmi + vnc

[Itstommy10]

Hi, is it possible to display the screen via HDMI as well as VNC or Spice? If I set VGA to something other than None, I get:

TASK ERROR: Legacy IGD assignment requires VGA mode to be 'none'

How can I do this? I currently use a Beelink U59 with an N5105 Jasper Lake.

[LongQT-sea]

Try with UPT mode passthrough:

qm set [VMID] -hostpci0 0000:00:02.0,romfile=igd.rom

qm set [VMID] --args "-set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on"

[Itstommy10]

Hi @LongQT-sea thanks for your patience, I tried with the solution you suggested and I get it

swtpm_setup: Not overwriting existing state file.
kvm: -device vfio-pci,host=0000:00:02.0,id=hostpci0,bus=pci.0,addr=0x10,romfile=/usr/share/kvm/igd.rom: info: IGD legacy mode enabled, use x-igd-legacy-mode=off to disable it if unwanted.
stopping swtpm instance (pid 831263) due to QEMU startup error
TASK ERROR: start failed: QEMU exited with code 1

and the vm doesn't start. Then I added qm set [VMID] -hostpci0 0000:00:02.0,legacy-igd=1,romfile=igd.rom

And the VM started, HDMI output works, but still no VNC.

I currently have this configuration:

args: -set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on
bios: ovmf
boot: order=scsi0;ide2;ide0;net0
cores: 4
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-100-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:02.0,legacy-igd=1,romfile=igd.rom
ide0: local:iso/virtio-win-0.1.285.iso,media=cdrom,size=771138K
ide2: local:iso/26200.6584.250915-1905.25h2_ge_release_svc_refresh_CLIENT_CONSUMER_x64FRE_it-IT.iso,media=cdrom,size=7465542K
machine: pc-i440fx-10.0+pve1
memory: 8192
meta: creation-qemu=10.0.2,ctime=1761660055
name:Windows11
net0: virtio=BC:24:11:7B:30:A4,bridge=vmbr0,firewall=1
number: 0
ostype: win11
parent: base
scsi0: local-lvm:vm-100-disk-1,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=e9bdd25a-dc9e-434b-9390-56fbb4a5e79a
sockets: 1
tpmstate0: local-lvm:vm-100-disk-2,size=4M,version=v2.0
usb0: host=0c45:7603,usb3=1
usb1: host=1-4,usb3=1
usb2: host=05dc:a81d,usb3=1
usb3: host=31b2:0010,usb3=1
vga: none
vmgenid: 39724823-70c6-457c-8816-63b7a129e981

Furthermore the audio via the HDMI does not work, nothing is detected audio device

[LongQT-sea]

Try with these:

qm set [VMID]  --vga std

qm set [VMID] -hostpci0 0000:00:02.0,romfile=igd.rom

qm set [VMID] --args "-set device.hostpci0.x-igd-legacy-mode=off  -set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on"

You also need to passthrough the PCH audio controller to the VM to have HDMI audio output.
On my PC, the PCH audio controller looks like this:
00:1f.3 Audio device [0403]: Intel Corporation 200 Series PCH HD Audio [8086:a2f0]

[Itstommy10]

Hi, thank you so much for your help. You're really kind. Unfortunately, I'm a bit of a beginner. I followed what you suggested and the error has changed. now with this config:

args: -set device.hostpci0.x-igd-legacy-mode=off -set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on
bios: ovmf
boot: order=scsi0;ide2;ide0;net0
cores: 4
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-100-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:02.0,romfile=igd.rom
hostpci1: 0000:00:1f.3
ide0: local:iso/virtio-win-0.1.285.iso,media=cdrom,size=771138K
ide2: local:iso/26200.6584.250915-1905.25h2_ge_release_svc_refresh_CLIENT_CONSUMER_x64FRE_it-IT.iso,media=cdrom,size=7465542K
machine: pc-i440fx-10.0+pve1
memory: 8192
meta: creation-qemu=10.0.2,ctime=1761660055
name:Windows11
net0: virtio=BC:24:11:7B:30:A4,bridge=vmbr0,firewall=1
number: 0
ostype: win11
parent: base
scsi0: local-lvm:vm-100-disk-1,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=e9bdd25a-dc9e-434b-9390-56fbb4a5e79a
sockets: 1
tpmstate0: local-lvm:vm-100-disk-2,size=4M,version=v2.0
usb0: host=0c45:7603,usb3=1
usb1: host=1-4,usb3=1
usb2: host=05dc:a81d,usb3=1
usb3: host=31b2:0010,usb3=1
vga: std
vmgenid: 39724823-70c6-457c-8816-63b7a129e981

I get:

swtpm_setup: Not overwriting existing state file.
kvm: -device VGA,id=vga,bus=pci.0,addr=0x2: PCI: slot 2 function 0 not available for VGA, in use by vfio-pci,id=hostpci0
stopping swtpm instance (pid 1005278) due to QEMU startup error
TASK ERROR: start failed: QEMU exited with code 1

[admarty]

Try:

qm set [VMID]  --vga vmware

[Itstommy10]

hi @admarty I tried each of the options pictured here.

Same error:

swtpm_setup: Do not overwrite existing state file.
kvm: -device virtio-vga,id=vga,bus=pci.0,addr=0x2: PCI: function 0 slot 2 not available for virtio-vga, in use by vfio-pci,id=hostpci0
Stopping swtpm instance (pid 1004798) due to a QEMU startup error
TASK ERROR: Startup failed: QEMU exited with code 1

or

swtpm_setup: Do not overwrite existing state file.
kvm: -device vmware-svga,id=vga,bus=pci.0,addr=0x2: PCI: Slot 2 function 0 not available for vmware-svga, in use by vfio-pci,id=hostpci0
Stopping swtpm instance (pid 1013114) due to a QEMU boot error
TASK ERROR: Boot failed: QEMU exited with code 1

[LongQT-sea]

Try changing the machine type to q35.

[Itstommy10]

with this config

bios: ovmf
boot: order=scsi0;ide2;ide0;net0
cores: 4
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-100-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:02.0,romfile=igd.rom
hostpci1: 0000:00:1f.3
ide0: local:iso/virtio-win-0.1.285.iso,media=cdrom,size=771138K
ide2: local:iso/26200.6584.250915-1905.25h2_ge_release_svc_refresh_CLIENT_CONSUMER_x64FRE_it-IT.iso,media=cdrom,size=7465542K
machine: pc-q35-10.0+pve1
memory: 8192
meta: creation-qemu=10.0.2,ctime=1761660055
name:Windows11
net0: virtio=BC:24:11:7B:30:A4,bridge=vmbr0,firewall=1
number: 0
ostype: win11
parent: base
scsi0: local-lvm:vm-100-disk-1,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=e9bdd25a-dc9e-434b-9390-56fbb4a5e79a
sockets: 1
tpmstate0: local-lvm:vm-100-disk-2,size=4M,version=v2.0
usb0: host=0c45:7603,usb3=1
usb1: host=1-4,usb3=1
usb2: host=05dc:a81d,usb3=1
usb3: host=31b2:0010,usb3=1
vga: none
vmgenid: 39724823-70c6-457c-8816-63b7a129e981

therefore with q-35 and without legacy-igd=1

output It disappeared on the HDMI.

If I put this instead:

bios: ovmf
boot: order=scsi0;ide2;ide0;net0
core: 4
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-100-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:00:02.0,legacy-igd=1,romfile=igd.rom
ide0: local:iso/virtio-win-0.1.285.iso,media=cdrom,size=771138K
ide2: local:iso/26200.6584.250915-1905.25h2_ge_release_svc_refresh_CLIENT_CONSUMER_x64FRE_it-IT.iso,media=cdrom,size=7465542K
machine: pc-i440fx-10.0+pve1
memory: 8192
meta: creation-qemu=10.0.2,ctime=1761660055
name:Windows11
net0: virtio=BC:24:11:7B:30:A4,bridge=vmbr0,firewall=1
number: 0
ostype: win11
parent: base
scsi0: local-lvm:vm-100-disk-1,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=e9bdd25a-dc9e-434b-9390-56fbb4a5e79a
sockets: 1
tpmstate0: local-lvm:vm-100-disk-2,size=4M,version=v2.0
usb0: host=0c45:7603,usb3=1
usb1: host=1-4,usb3=1
usb2: host=05dc:a81d,usb3=1
usb3: host=31b2:0010,usb3=1
vga: none
vmgenid: 39724823-70c6-457c-8816-63b7a129e981

it only goes hdmi but I can't set any vga

[LongQT-sea]

lspci -nn

[Itstommy10]

root@proxmox:~# lspci -nn

00:00.0 Host bridge [0600]: Intel Corporation Device [8086:4e24]
00:02.0 VGA compatible controller [0300]: Intel Corporation JasperLake [UHD Graphics] [8086:4e61] (rev 01)
00:04.0 Signal processing controller [1180]: Intel Corporation Dynamic Tuning service [8086:4e03]
00:14.0 USB controller [0c03]: Intel Corporation Jasper Lake USB 3.1 xHCI Host Controller [8086:4ded] (rev 01)
00:14.2 RAM memory [0500]: Intel Corporation Jasper Lake Shared SRAM [8086:4def] (rev 01)
00:15.0 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #0 [8086:4de8] (rev 01)
00:15.1 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #1 [8086:4de9] (rev 01)
00:15.2 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #2 [8086:4dea] (rev 01)
00:15.3 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #3 [8086:4deb] (rev 01)
00:16.0 Communication controller [0780]: Intel Corporation Management Engine Interface [8086:4de0] (rev 01)
00:17.0 SATA controller [0106]: Intel Corporation Jasper Lake SATA AHCI Controller [8086:4dd3] (rev 01)
00:19.0 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #4 [8086:4dc5] (rev 01)
00:19.1 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO I2C Host Controller #5 [8086:4dc6] (rev 01)
00:1c.0 PCI bridge [0604]: Intel Corporation Jasper Lake PCIe Root Port #5 [8086:4dbc] (rev 01)
00:1c.5 PCI bridge [0604]: Intel Corporation Device [8086:4dbd] (rev 01)
00:1c.6 PCI bridge [0604]: Intel Corporation Jasper Lake PCIe Root Port #7 [8086:4dbe] (rev 01)
00:1e.0 Communication controller [0780]: Intel Corporation Jasper Lake Serial IO UART Controller #0 [8086:4da8] (rev 01)
00:1e.3 Serial bus controller [0c80]: Intel Corporation Jasper Lake Serial IO SPI Controller #1 [8086:4dab] (rev 01)
00:1f.0 ISA bridge [0601]: Intel Corporation Jasper Lake eSPI Controller [8086:4d87] (rev 01)
00:1f.3 Audio device [0403]: Intel Corporation Jasper Lake HD Audio [8086:4dc8] (rev 01)
00:1f.4 SMBus [0c05]: Intel Corporation Jasper Lake SMBus [8086:4da3] (rev 01)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Jasper Lake SPI Controller [8086:4da4] (rev 01)
01:00.0 Network controller [0280]: Intel Corporation Wireless 3165 [8086:3165] (rev 81)
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)

[LongQT-sea]

I will do extended testing on UPT mode passthrough and get back to you later.

[Itstommy10]

thank you

[LongQT-sea]

Here’s how you should set up UPT mode passthrough:

Replace VMID with your real VM ID

qm set VMID --args "-set device.hostpci0.bus=pcie.0 -set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on"

qm set VMID --machine pc-q35-9.1

qm set VMID --hostpci0 0000:00:02.0,romfile=igd.rom

# Optional: enable VNC (though setting it to “none” is still recommended)
qm set VMID --vga vmware

Note

In UPT mode, the display output over HDMI or DisplayPort is delayed until the guest OS drivers are fully loaded.

[dastrix80]

Thanks for your work on this. I have similiar issue. Using the Ultra 7 / Arrow Lake with iGPU and trying to pass through to Windows 11. My PC is headless, so using VNC is needed to setup the machine.

Im using the test repo KVM 10.1.2

PC starts, but it has no IP and no VNC so I can't do much :( any help would be great

[dastrix80]

Just a follow up, did a whole new VM with the settings and I can get VNC and Windows 11 sees a 128MB Graphics card installed. I guess thats working?

[LongQT-sea]

Yes, it's working.
However, do not use that VNC display for work, it doesn’t have graphics acceleration on the emulated display. Instead, use RDP or Chrome Remote Desktop.

[Itstommy10]

Hi @LongQT-sea , thank you for your time and your work. It worked.
One last question: currently, with the latest configuration with your suggestions, the first screen is the VNC one and the second is the HDMI one. Is it possible to swap them?
I also tried the audio controller with PCIe1, but it's not being detected yet. I'll check as soon as I get home to see if I need to install any drivers.

[LongQT-sea]

Hey, glad it worked!
I’m a bit confused though, why would you want to keep using the VNC display? You already have a real iGPU passthrough to the VM, so you can use the actual display with USB passthrough or a Remote Desktop tool like RDP, Chrome Remote Desktop, or Parsec for proper graphics acceleration. The virtual VNC screen doesn’t really make sense in that setup.
By the way, you can swap the displays in the Display settings of your guest VM.

[Itstommy10]

Hi @LongQT-sea , sorry I haven't responded, but I was away on the weekend. You're right, the idea of ​​using VNC was just for convenience (the mini PC with Proxmox and the VM is connected to the TV via HDMI, but you might also need external control if the TV is busy). You're right, there are more convenient systems like RDP, etc.
I've been looking for a solution for months, you've been my savior. So far, I've also set the audio in hostpcie1 to 0000:00:1f.3, but it's not detected in the VM. What should I do?

[LongQT-sea]

Try this brotha:

qm set VMID --args "-set device.hostpci0.bus=pcie.0 -set device.hostpci0.addr=2.0 -set device.hostpci0.x-igd-opregion=on -set device.hostpci1.bus=pcie.0 -set device.hostpci1.addr=3.0"

Also install the audio driver from your Mini PC manufacturer and the full Intel graphics driver (not the one automatically installed by Windows Update).

[Itstommy10]

I set the legacy mode as you suggested and the audio actually doesn't come out even like that

[LongQT-sea]

Try boot directly from Ubuntu live iso then use Firefox to play something to see if the audio works:
Ubuntu Desktop 24.04

[Itstommy10]

Hi, I tried, but it still won't work.
I'm still passing the audio device to hostpcie1.
I only need Windows.
root@proxmox:~# lspci | grep Audio
00:1f.3 Audio device: Intel Corporation Jasper Lake HD Audio (rev 01)

[LongQT-sea]

On my VM, it also looks like yours, and it works fine. I’m not sure what’s wrong with your setup.

[Itstommy10]

Hi @LongQT-sea , I've been tinkering around a bit, and comparing the two VMs, I see these differences...
Maybe I have something wrong set in the Proxmox node?