Only HDMI port is supported, DP display is not supported

[AutMaple]

Hello everyone,

I have successfully pass through the RTX2080Ti to Windows11 and Archlinux according to the community post. But when I connect an external monitor, I find that only HDMI is supported, not DP, for both Windows and Archlinux.

Can anyone suggest any other solutions or workarounds for this issue? Thanks in advance for your help!

 

[Moayad]

My guess when you plug in the DP port, you have to reboot the VM. Did you try that already?

 

[ulfalfa]

Hi,
I have the same problem with my alderlake gpu in a Miniforums NAB6. I only get Output from my VM over HDMI (and only in one the two plugs) but not with USB-C.

Xrandr shows
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384 DP-1 disconnected primary (normal left inverted right x axis y axis) HDMI-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 301mm x 188mm 1920x1200 60.00*+ 60.00 1920x1080 60.00 59.94

The USB-C connection is working on the host device, so the cable seems to be fine. I rebooted multiple times with cable attachted and not.

Finally I only want to attach only one cable (including power delivery).

Anybody an idea?

 

[ulfalfa]

Just after writing (and a long 2 week journey with googeling) I've found the solution.

I had to supply rom files for the gpu and the audio interface and had to set some parameter.
I found the romfiles at https://github.com/gangqizai/igd
my guest config shows now

args: -set device.hostpci0.x-igd-opregion=on
balloon: 0
bios: ovmf
boot: order=scsi0;net0
cores: 1
cpu: x86-64-v2-AES
efidisk0: tank:vm-110-disk-0,efitype=4m,pre-enrolled-keys=1,size=528K
hostpci0: 0000:00:02.0,pcie=1,romfile=gen12_igd.rom
hostpci1: 0000:00:1f.3,pcie=1,romfile=gen12_gop.rom
machine: q35
memory: 8219
meta: creation-qemu=8.1.2,ctime=1701675796
name: deb-kiosk
net0: e1000=BC:24:11:E1:21:1E,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: tank:vm-110-disk-1,iothread=1,size=32G
scsihw: virtio-scsi-single
smbios1: uuid=285b1411-205e-4526-b506-607a960b077e
sockets: 2
usb0: host=27c0:0859
usb1: host=1-1.1
vga: none
vmgenid: 6af4a28d-b9af-47c5-9c7f-01c29da49413

Now I see all video outputs in my virtual machine. Maybe it'll will also help. me with my Win11 problem (Error 43)....

Hope this helps...