[vfio-users] Intel 520 Integrated Graphics Card Passthrough Issues

[Roger Lawhorn]

Can I get your laptop or mb make and model?
I spent years perfecting the use of an Optimus (nvidia / intel) laptop 
to do gpuu passthrough.
Maybe I can help.
I contribute to a how to here:
https://forums.linuxmint.com/viewtopic.php?t=212692


On 6/28/20 11:38 PM, Jeff Tchang wrote:
> Posted this on a Proxmox forum as well but wanted to see if anyone had 
> any ideas on getting an Intel 520 integrated GPU (Skylake) working. 
> For reference these are NUC 6i3.
>
> The issue I am seeing is that upon starting the VM with PCI 
> passthrough enabled the screen blanks and just goes dark.
>
> I am seeing dmesg lines:
>
> [202.990645] DMAR: DRHD: handling fault status reg 2
>
> [202.990662] DMAR: [DMA Write] Request device [00:02.0] PASID ffffffff 
> fault addr 0 [fault reason 02] Present bit in context entry is clear
>
> [203.384895] vfio-pci 0000:00:02.0: vgaarb: changed VGA decodes: 
> olddecodes=io+mem,decodes=io+mem:owns=io+mem
>
>
> More details available here: 
> https://gist.github.com/tachang/66d0db979aa6d9149a5a284e15b9bd74
>
> I've seen one older thread which seems to apply to my situation.
> https://www.redhat.com/archives/vfio-users/2018-May/msg00008.html
>
> To continue I don't see anything useful in the libvirt domain log 
> (https://gist.github.com/tachang/f5d6b10e8e1e7f7ac2a5bb1180f6c096)
>
> -Jeff
>
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