Intel iGPU Passthrough error with Supermicro X11SCH-LN4F

[kalam]

I've been trying to passthrough my Intel Xeon E-2288G's UHD P630 iGPU to a Virtual Machine in TrueNAS Scale on a Supermicro X11SCH-LN4F motherboard and have been unable to so far.

VT-d is enabled in the BIOS.

iGPU is listed with lspci

iGPU shows up as an IOMMU group

If I try to isolate the GPU PCI Id in TrueNAS Scale I get the following error.

If I try to add the iGPU to a VM I get the following error.

My Google-fu has been unable to find a solution to this. Has anyone else with a Supermicro X11SCH-* motherboard been able to passthrough the Intel iGPU? Is there anything I'm missing?

 

[Samuel Tai]

Are you using the iGPU to drive the host display? If so, the error message is correct. The host system has grabbed it, and it won't be possible to pass it through to the VM.

 

[kalam]

Ah, is there any way to force the host not to use it?

Is this jira ticket (https://jira.ixsystems.com/browse/NAS-110006) and form post https://www.truenas.com/community/t...uest-allow-single-gpu-for-passthrough.100390/ the same issue I'm experiencing? That you can't passthrough a GPU if you only have 1 in the system?

 

[Samuel Tai]

Ah, is there any way to force the host not to use it?

No, because it's in the CPU die, and comes up as soon as the CPU boots.

Is this jira ticket (https://jira.ixsystems.com/browse/NAS-110006) and form post https://www.truenas.com/community/t...uest-allow-single-gpu-for-passthrough.100390/ the same issue I'm experiencing? That you can't passthrough a GPU if you only have 1 in the system?

Yes, same issue.

 

[kalam]

I tried adding a spare NVIDIA GTX 970 GPU to test if it was possible to isolate the Intel iGPU with a second GPU in the system. I still couldn't isolate the Intel iGPU, but I could with the NVIDIA GPU.

Darn, I guess there's no way to stop TrueNAS Scale from using the Intel iGPU.

Thanks for your assistance.