[vfio-users] No HDMI audio from AMD RX480 when passed through to Windows 8.1 VM.

[Luke Yelavich]

On Wed, Jan 18, 2017 at 08:21:05PM AEDT, Luke Yelavich wrote:
> Greetings.
> I'm writing with a rather annoying problem. I am unable to get audio output 
> through HDMI on an AMD RX480 card that is being passed through to a Windows 
> 8.1 VM.

So, I decided to create the VM again but using legacy BIOS instead of UEFI. Low and behold, the HDMI audio works fine, although I have to leave a spice/QXL video card attached to the VM otherwise it won't boot, unlike with UEFI where I need only have the AMD card passed through and the VM will boot.

Is there any work-around for the above, or will I need to keep a spice video around as a secondary monitor, even though I don't use it?

Thanks.

Luke