Re: [Xen-users] GTX 670 Tips?

[Gordan Bobic <gordan@xxxxxxxxxx>]

On 10/27/2013 04:36 PM, Casey DeLorme wrote:
> On Sun, Oct 27, 2013 at 5:35 AM, Gordan Bobic <gordan@xxxxxxxxxx
> <mailto:gordan@xxxxxxxxxx>> wrote:
>
>     On 10/27/2013 07:32 AM, Casey DeLorme wrote:
>
>              I'm pretty sure gfx_passthru=1 doesn't work without additional
>              patches to do things like load and execute the VBIOS in domU.
>
>         Yeah I saw the flag mentioned, but wasn't sure if it was in the
>         context
>         of "windows only" or linux also.  From the sound of things that flag
>         works with qemu traditional only, with modded cards and no patches.
>
>
>     I never tried anything but qemu-traditional, and I don't use
>     gfx_passthru=1. I don't see a good reason for adding extra
>     complication to a setup that is already very fragile.
>
> I thought primary passthru could not be acheived without it, but maybe I
> was wrong?  It uses the nVidia card when the nouveau graphics are
> running, but once I install the nvidia drivers it seems to fallback to
> the emulated graphics.
So Nvidia binary driver isn't playing nicely, even though nouveau driver 
is. Are you sure you blacklisted the nouveau driver in domU? It may be 
worth checking if it is loaded using lsmod.
>              Remind me - did you modify your card into a Quadro/Grid?
>
>              I'm sure I remember David mentioning he had Linux domU
>         running with
>              accelerated drivers.
>
>
>         The card is modded to Grid K1 (Linux sees it as GK104).
>
>         I tried the `nvidia-kernel-dkms` package, and have also tried
>         the latest
>         downloaded drivers (3.19.60
>         http://www.nvidia.com/object/__unix.html
>         <http://www.nvidia.com/object/unix.html>).
>            Neither worked, when I installed from the downloaded package
>         it said
>         it was built for gcc 4.6 and could be incompatible.  It appeared to
>         still install, but again no video.
>
>
>     What distro are you running? Sounds like it might be a little too
>     bleeding edge.
>
> I am using debian wheezy, so not exactly bleeding edge.  In fact I'm
> wondering if it's the lack of bleeding edge support that might be the
> cause of my problems.
>
> I will probably try Ubuntu and maybe Arch a bit later.
Can't really help there, I'm an EL6 user, and I don't run Linux domUs 
with VGA passthrough.
Gordan

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