xorg 7.6, nvidia multiseat completely broken?

Aaron Plattner aplattner at nvidia.com
Sun Nov 11 20:11:49 PST 2012

On 11/11/12 06:34, Ditmar Unger wrote:
> Hello,
> things are getting worse than ever. Until OpenSuSE 12.1 I had a working
> dualseat configuration with separated mice and keyboards for years. Now,
> with SuSE 12.2, xorg 7.6, two nvidia cards (610GT and 430GT) and the
> newest driver nvidia-computeG02-304.64-22.1.x86_64 I cannot even start
> two x Servers any more, no matter if I use one xorg.conf as shown below
> or two xorg.conf.seat[1,2] as recommended in
> http://wiki.gentoo.org/wiki/Multiseat because when the display cable is
> connected to the second seat the X-Server now just crashes and the
> computer needs a reboot.
> The error messages in /var/log/Xorg.0.log says:
> NVIDIA(GPU-1): Failed to allocate EVO core DMA push buffer
> Caught signal 11 (Segmentation fault). Server aborting
> and if you google this, you find in
> http://www.nvnews.net/vbulletin/showthread.php?t=185042
> nvidia saying "Multiseat configurations are not supported, I'm afraid.
> Sorry."

This is correct, it's not supported, but reports like this one do help 
us prioritize feature requests.

> This is incredible, who the hell does such stupid things and: why?
> So after frustrating hours of playing with different graphic cards and
> configurations all I know is that I should never have updated the
> working configuration; the rest is nothing but bull shit.
> Now, for the very last chance before giving up with multiseat on Linux -
> are there any hints of wise old Scandinavian men left?

I doubt it will help, and I don't want to imply that we're going to 
support these configurations, but does setting

   Option "ProbeAllGpus" "off"

in both xorg.conf files help?

-- Aaron

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