On 2013-12-19 10:19 AM, Alex Williamson wrote:
On Thu, 2013-12-19 at 01:48 -0500, Stewart Adam wrote:
Hi,
I am trying to get VGA passthrough working using KVM and VFIO like
described on this [1] thread and ran into some issues I was hoping
someone could shed some light on. I have tried various configurations,
but can't seem to get it working correctly. Either I get "Code 10"
device error in Windows, or I get a BSOD 0x00000116 (VIDEO_TDR_ ERROR:
attempt to reset the display driver and recover from a timeout failed)
when booting the machine after installing the Catalyst 3D drivers.
Other users on the Arch Linux forum have also reported similar issues.
<cut>
Hi Stewart,
The "x" in the x-vga option is for eXperimental. It works in some
cases, not others. The archlinux forum thread is the best place to
either get help or commiserate with others having the same problem. The
advice there is largely not distribution specific. The 0x116 BSOD is a
common problem with assigned Radeon graphics, we don't have a solution
yet. Also note that this work is still under development, for the
current "state of the art" you need a 3.13-rc kernel and qemu.git, and
you may need to patch in some Intel graphics fixes for VGA arbitration.
Even then, I have no reason to suspect the 0x116 BSOD is fixed. More
users seem to be having success with Nvidia cards, so if that's an
option for you, it may be the quickest path to results. Thanks,
Alex
Hi Alex,
Thanks for replying so quickly. Ironically, I normally buy nVidia and
purchased this Radeon card because I had read online they tend to do
passthrough better (with Xen at least)... I didn't have much luck when I
tried a Xen VM either though. I do have an nVidia card handy and will try
that later tonight.
Would the VGA arbitration patches relate to the Code 10 errors? Also, I will
try again with 3.13-rc later this week but should I use qemu-vfio.git or
qemu.git?
I realize this is all bleeding edge and thank you for all of your work on
it. Is there anything I can do to help you debug the 0x116 problem?
Lastly, out of curiosity - is the 0x116 error dependent on particular piece
of hardware or it's a problem with the emulation layer + certain GPUs?
Regards,
Stewart
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