[vfio-users] Dual monitor with spice display + hdmi

[Jayme Howard]

It just treats them as independent displays.  It can either mirror them, or
extend the desktop onto multiple.  It can't do multiple independent
desktops.  A real life example of this is a motherboard with onboard video
coupled with a discrete GPU in a slot.  As long as the onboard isn't
disabled, they can work in tandem, at least for software rendering.  From
what I understand, as well, DirectX 12 and Vulkan both support hardware
rendering with multiple GPUs of different brands.

On Wed, Jan 18, 2017 at 1:45 PM, Will Marler <will at wmarler.com> wrote:

> That's an interesting scenario ... How does Windows handle multiple
> graphics cards? Like, let's say this was all bare metal, and the machine
> had 2 different models of nVidia cards and an ATI card, with a monitor
> connected to each card. Would Windows be able to display a desktop on each
> monitor, or span a single contiguous desktop across them? If yes then I'd
> guess that what you're asking is at least theoretically possible, though
> I've never tested personally.
>
> On Wed, Jan 18, 2017 at 12:19 PM, Jayme Howard <g.prime at gmail.com> wrote:
>
>> I've used both together, but I don't remember if one was mirroring the
>> other or if I did it as dual-monitor.  It was a configuration I abandoned
>> early on.  It DID work, but it caused (about 75% of the time) Nvidia code
>> 43 issues for me.  But it definitely did work outside of that.
>>
>> On Wed, Jan 18, 2017 at 1:08 PM, Doug Applegate <doug.applegate at gmail.com
>> > wrote:
>>
>>> Is it possible for a guest VM to use both spice server graphics with
>>> qxl video AND hdmi gpu passthrough? Could the guest be configured
>>> (windows 10 in this case) see it as a dual-monitor setup?
>>>
>>> Has anyone tried this or gotten it to work?
>>>
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>>
>>
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>
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