[Question] SR-IOV, creating virtual/fake monitor so that the host can have a display inside the VM

[XutaxKamay]

Hello,

Something I've been wondering about, is it possible to create a fake/virtual monitor with the SR-IOV feature ?

Currently, when passing-through the VF devices inside a Windows guest, there's no display/monitors attached to them which makes it impossible to have an accelerated display (we are stuck using a remote display protocol currently from my research and understanding).

There's currently two approaches I think that could solve the problem:

• Modify the Intel GPU driver inside the Windows guest to have the possibility to create dummy video output so that https://looking-glass.io can be used ? (it means that Intel needs to modify the proprietary Windows driver)
• A virtual monitor could be created, so that we can display inside the linux host the Windows guest by modifying the i915's SR-IOV driver somehow ? (I could do that if it's possible, but I guess I'll need some guidance)

Sorry if it has been already answered, already asked or solved.

Thank you.

[eero-t]

Something I've been wondering about, is it possible to create a fake/virtual monitor with the SR-IOV feature ?

I'm not related to this project, but what is "fake/virtual monitor"? Are you referring to some specific device file, kernel feature or what?

[XutaxKamay]

Something I've been wondering about, is it possible to create a fake/virtual monitor with the SR-IOV feature ?

I'm not related to this project, but what is "fake/virtual monitor"? Are you referring to some specific device file, kernel feature or what?

It would be most likely, if possible, a kernel module option inside this module yes. Currently, from my understanding, it is not possible to use "looking glass" without having a display on the virtual function or the Intel GPU itself if I tried it. Hence why I was wondering if it was possible to create a fake/virtual video output on the VFs themselves as they are virtualized so that we can use looking glass on it.
Looking glass is capturing basically the video output and transfers it to the host, but this can't happen without a display in the first place.

Its been months now that I didnt try such thing so I dont remember more exact technical details but I think this may be solve my problem https://github.com/roshkins/IddSampleDriver