Question about what would show up if I plug a monitor on two instances of Intel HD530 iGPU as a mediated device

Hardware Hub GPU
1

I have a system with an Intel Core i7-6700K which has the Intel HD530 iGPU.

I have two VMs, set up in Proxmox 8.4.1 where it is now using said HD530 iGPU as a mediated device, so that I can share the single iGPU between two Windows 11 VMs.

My question is, when I plug a monitor to the HDMI port on the motherboard, how will I know which VM will that port be displaying the output from (which VM)?

2

Is mediated device just sr-iov but a different name?
Or is this virtio-gpu?

3

It’s a mediated device.

HD530 does not work with SR-IOV. I tried. (SR-IOV works with the Iris Xe iGPU from Alder Lake and beyond apparently, and there is at least some anecdotal commentary about working as early as 10th gen Intel, but I haven’t been able to positively confirm SR-IOV suppoort on said Intel 10th gen CPU. Prior to that, it doesn’t work.)

(SR-IOV can support up to 127 VFs. As a mediate device, it can only support one “high” configuration instance or two “medium/low” configurations, but only upto 2. Therefore; if I want to share the HD530 iGPU with more VMs, I can’t do that, unless I shut others down.)

Thank you.