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

[Daimon Wang]

Yes, I can confirm that a PC with on-board Intel card and an NV card can be 
configured for dual-monitor, with Aero on. And I can make a video window across 
both screen.However, I haven't success with Linux host. I've read in another 
thread that you can start 2 X server, each for one card.
While for VM, the qemu pass-through readme said IGD card can be the secondary 
card for calculation only (so no output). This mode is named "Universal 
Pass-Through", so maybe the NV card in this mode will have the same behavior?
Regards,Daimon 

On Thursday, January 19, 2017 3:57 AM, Jayme Howard  
wrote:
 

 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  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  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  
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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Re: [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  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  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 > > 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?
>>>
>>> ___
>>> vfio-users mailing list
>>> vfio-users@redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>
>>
>>
>> ___
>> vfio-users mailing list
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>>
>>
>
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Re: [vfio-users] Dual monitor with spice display + hdmi

[Will Marler]

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  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 
> 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?
>>
>> ___
>> vfio-users mailing list
>> vfio-users@redhat.com
>> https://www.redhat.com/mailman/listinfo/vfio-users
>>
>
>
> ___
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>
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Re: [vfio-users] Dual monitor with spice display + hdmi

[Jayme Howard]

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 
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?
>
> ___
> vfio-users mailing list
> vfio-users@redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users
>
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[vfio-users] Dual monitor with spice display + hdmi

[Doug Applegate]

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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