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Re: [Xen-users] GTX 670 Tips?

On 10/27/2013 06:14 AM, Casey DeLorme wrote:
@Andrew, sorry I will do that going forward.

@David, having trouble with linux and could use some more info.

I created a linux domu config with `gfx_passthru=1`, but the system
never boots (sits at "serial0 console" when seen through vnc or sdl).

I'm pretty sure gfx_passthru=1 doesn't work without additional patches to do things like load and execute the VBIOS in domU.

If I omit that flag, I get video post-installation (not during install)
from the `nouveau` driver, which works but isn't performant. However,
after installing nvidia drivers and rebooting, I only get video over

So you get VNC video during installation, and you get external output from the card from the nouveau driver. So far so good.

FYI, the noiveau driver isn't _too_ bad. If all you need is 2D acceleration, I can confirm that an ageing 8800GT with nouveau driver is perfectly capable of running HD video scaled up to 3840x2400 (2x1920x2400 across 2 monitors).

Nobody has really written any definitive guides on linux vga
passthrough, so I'm not sure where to go from here.  I am not sure how
Xorg works, that might be a good first step, but I tried creating
configurations based on debian's documentation

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.


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