GPU Passthrough problem

[Eric Viseur]

Hello everyone,

As many other before me, I'm having problems with GPU Passthrough.  I'm
running Fedora 20 with kernel 3.13.3 and the packages from the virt-preview.
My configuration is a Dell OptiPlex 7010, equipped with a Core i5 3470 and
a Radeon HD7570 from Dell.

VT-d and vfio work fine for other devices, such as the audio controller,
but I can't seem to passthrough the graphic cards.  Primary passthrough
simply fails, secondary passthrough with a Cirrus VGA gives me Error 10.
In both cases, I hear the GPU fan reacting when the VM boots, but then
nothing happens.

I tried blacklisting completely the i915 driver, as I can live without it.
This is for a project aimed at a seamless interaction with a Windows VM,
the Linux hypervisor doing background processing, hidden from the user.
Given my situation, what are my best next shots ?

Eric Viseur
Etudiant Ingénieur Civil Electricien
LinkedIn Profile<http://www.linkedin.com/profile/view?id=193442069&trk=tab_...

[Cole Robinson]

On 02/17/2014 02:58 AM, Eric Viseur wrote:
>  Hello everyone,
>  
>  As many other before me, I'm having problems with GPU Passthrough.  I'm
>  running Fedora 20 with kernel 3.13.3 and the packages from the virt-preview.
>  My configuration is a Dell OptiPlex 7010, equipped with a Core i5 3470 and a
>  Radeon HD7570 from Dell.
>  
>  VT-d and vfio work fine for other devices, such as the audio controller, but I
>  can't seem to passthrough the graphic cards.  Primary passthrough simply
>  fails, secondary passthrough with a Cirrus VGA gives me Error 10.  In both
>  cases, I hear the GPU fan reacting when the VM boots, but then nothing happens.
>  
>  I tried blacklisting completely the i915 driver, as I can live without it. 
>  This is for a project aimed at a seamless interaction with a Windows VM, the
>  Linux hypervisor doing background processing, hidden from the user.  Given my
>  situation, what are my best next shots ?
>   
I'd recommend trying qemu.git as well, this stuff is still under active
development.

Also see this thread for some possibly related discussion:
https://lists.fedoraproject.org/pipermail/virt/2013-December/003911.html

But maybe Alex has more suggestions.

- Cole

[Alex Williamson]

On Mon, 2014-02-17 at 10:15 -0500, Cole Robinson wrote:
>  On 02/17/2014 02:58 AM, Eric Viseur wrote:
>  > Hello everyone,
>  > 
>  > As many other before me, I'm having problems with GPU Passthrough.  I'm
>  > running Fedora 20 with kernel 3.13.3 and the packages from the virt-preview.
>  > My configuration is a Dell OptiPlex 7010, equipped with a Core i5 3470 and a
>  > Radeon HD7570 from Dell.
>  > 
>  > VT-d and vfio work fine for other devices, such as the audio controller, but I
>  > can't seem to passthrough the graphic cards.  Primary passthrough simply
>  > fails, secondary passthrough with a Cirrus VGA gives me Error 10.  In both
>  > cases, I hear the GPU fan reacting when the VM boots, but then nothing happens.
>  > 
>  > I tried blacklisting completely the i915 driver, as I can live without it. 
>  > This is for a project aimed at a seamless interaction with a Windows VM, the
>  > Linux hypervisor doing background processing, hidden from the user.  Given my
>  > situation, what are my best next shots ?
>  > 
>  
>  I'd recommend trying qemu.git as well, this stuff is still under active
>  development.
>  
>  Also see this thread for some possibly related discussion:
>  https://lists.fedoraproject.org/pipermail/virt/2013-December/003911.html
>  
>  But maybe Alex has more suggestions. 
The archlinux forums linked in the above is the best source of
information, but it's currently down.  In short, there is no
out-of-the-box solution for assignment of consumer VGA cards.  Much of
the code is upstream, but there are still pieces like i915 vga arbiter
support that require patches.  Thanks,

Alex