two-seat configuration with nvidia 3D-Vision does not work in stereo

Andy Ritger aritger at
Wed Jun 30 01:10:20 PDT 2010

Hello, Joachim.  I think this is an NVIDIA driver issue, rather than
an X.Org issue.  Best to take this up on linux-bugs at rather
than xorg at

The NVIDIA driver does not presently have a way to specify which USB
stereo emitter to use.  That is a reasonable thing for us to add, though.

In the mean time, unfortunately I cannot think of any good work arounds
to suggest.

- Andy Ritger

On Wed, 30 Jun 2010, Greipel.Joachim at wrote:

> Hi all,
> We have a number of workstations equipped w. Quadro FX 3800, 3D-Vision Stereo
> Glasses and Samsung 2233RZ 120 Hz Monitors. We are using OpenGL quad buffered
> Stereo under openSuSE LINUX 11.2 using the proprietary NVIDIA driver
> An attempt to equip the workstations with an additional set of the same
> Graphics Card, Monitors, Stereo Emitter, Keyboard and Mouse to realize a
> multiseat configuration however was not successful in respect to stereo display:
> We configured the computers essentially as shown in
> and this at a first glance seemed to work.
> Unfortunately the second seat configuration did not recognize the second USB
> Stereo Emitter and subsequently on this seat stereo was disabled.
> The error message in the Xorg.1.log was
> "Failed to claim USB interface for stereo emitter device. Disabling stereo"
> On the second stereo emitter the led was slowly blinking in red.
> On the other hand both Stereo-Emitters were listed in /proc/bus/usb/devices.
> Does anyone have a hint how to set the second stereo emitter into function?
> Regards,
> Joachim
> --
> Dr. rer. nat. Joachim Greipel
> Med. Hochschule Hannover
> Biophys. Chem. OE 4350
> Carl-Neuberg-Str. 1
> 30625 Hannover
> Germany
> Fon: +49-511-532-3718
> Fax: +49-511-532-8924

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