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

Greipel.Joachim at Greipel.Joachim at
Wed Jun 30 00:27:12 PDT 2010

Hi all,
We have a number of workstations equipped w. Quadro FX 3800, 3D-Vision
Glasses and Samsung 2233RZ 120 Hz Monitors. We are using OpenGL quad
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
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
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
On the second stereo emitter the led was slowly blinking in red.
On the other hand both Stereo-Emitters were listed in
Does anyone have a hint how to set the second stereo emitter into

Dr. rer. nat. Joachim Greipel
Med. Hochschule Hannover
Biophys. Chem. OE 4350
Carl-Neuberg-Str. 1
30625 Hannover
Fon: +49-511-532-3718
Fax: +49-511-532-8924
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