[vfio-users] Igd passthrough not working on w10, works with ubuntu

[Alex Williamson]

On Sat, 9 Mar 2019 23:22:49 +0100
Cor Saelmans <c.saelmans at gmail.com> wrote:

> I have Ubuntu 18 as host.
> 
> 
> Created two guests with virt-manager, setup vfio settings like described in
> several guides.
> 
> 
> GPU: Intel Graphics 655
> 
> 
> guest 1: Ubuntu: Passthrough is working. VM boots and after several seconds
> Ubuntu boot screen shows up and it its working.
> 
> 
> 
> guest 2: Windows 10: Passthrough is not working. When booting the VM the
> monitor screen flashes and goes to "no signal input". When I look with
> teamviewer on the machine the graphics pci device is working correctly and
> drivers are installed.
> 
> 
> What is going  wrong?

Display output is not officially supported in "universal passthrough
mode", you can try to enable it with the x-igd-opregion=on option for
the device.  The Windows drivers depend on this.  Thanks,

Alex