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Old 01-02-06, 09:51 AM   #1
mwr
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Default 8174/8178, TwinView and Stereo on Quadro FX 4500

I have a problem on Linux, Kernel 2.6.14.4, Debian testing: When trying to enable stereo (should be passive stereo using both DVI plugs on the card, there are two beamers connected to DVI) everything seems to go well but I don't get visuals that support stereo. I tried a lot of things (like supplying pci=noacpi as a kernel parameter) but nothing helps. Does anybody have an idea on how to make stereo work on this configuration?

I attached the xorg configuration and the log file. FYI: The server layout used is "Stereo Layout".
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File Type: txt xorg.conf.txt (3.1 KB, 156 views)
File Type: log Xorg.0.log (43.6 KB, 129 views)
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Old 01-02-06, 10:21 AM   #2
netllama
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

What kind of stereo application(s) are you using?

Also, please generate and post a bug report.

Thanks,
Lonni
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Old 01-02-06, 10:52 AM   #3
mwr
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Ok, here you are. the bug report is attached. I used an example opengl application. You can find it here:
http://astronomy.swin.edu.au/~pbourk...reogl/pulsar.c
Homepage is:
http://astronomy.swin.edu.au/~pbourke/opengl/stereogl/

Parameter -s will enable stereo. But it doesn't find a visual and glxinfo also doesn't show a visual with stereo support.

And additionally for your information: The computer is a Dell Precision 470 workstation.

And thanks for looking into this.

Matthias
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File Type: zip nvidia-bug-report.zip (25.8 KB, 118 views)
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Old 01-02-06, 03:47 PM   #4
netllama
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

When you say that this app doesn't find a visual, are you getting an error, or is stereo just silently failing?

Also, please post the output from glxinfo.

Thanks,
Lonni
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Old 01-03-06, 04:42 AM   #5
mwr
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

The app fails with an error. The error is, with openglut:

pulsar: og_window.c:440: ogOpenWindow: Assertion `window->Window.VisualInfo != ((void *)0)' failed.

and with freeglut:

freeglut (./pulsar): ERROR: Internal error <Visual with necessary capabilities not found> in function fgOpenWindow
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 4 (X_DestroyWindow)
Resource id in failed request: 0x0
Serial number of failed request: 14
Current serial number in output stream: 17

Additionally I attached the outputs from glxinfo and from xdpyinfo.

Matthias
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File Type: txt glxinfo.txt (10.6 KB, 143 views)
File Type: txt xdpyinfo.txt (23.2 KB, 136 views)
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Old 01-03-06, 04:38 PM   #6
netllama
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Thanks. I've reproduced this problem, and opened bug 204352 for the issue.

-Lonni
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Old 01-04-06, 03:05 AM   #7
mwr
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Thank you very much. I hope it will be solved soon. :-)
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Old 05-03-06, 01:26 PM   #8
pixelhead
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Hi,

Just curious if this TwinView/Quadro4500/Stereo has been fixed with driver 8476.

I'm using freeglut and am getting the following error:

ERROR: Internal error <Visual with necessary capabilities not found> in function fgOpenWindow

Thanks!
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Old 05-03-06, 01:32 PM   #9
netllama
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

If you're referring to the 1.0-8756 driver, then no, I'm afraid that this bug has not been resolved yet. I should note that this issue is specific to the pulsar app, and not stereo in general.

Thanks,
Lonni
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Old 05-03-06, 01:57 PM   #10
pixelhead
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Hi Lonni,

Thanks for the quick reply. I'm not running the pulsar app from the original poster but it appears we are both using freeglut. I'm creating the window like this:

glutInitDisplayMode( GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL | GLUT_STEREO );

The code works fine on WIN32; the port to Linux doesn't work.

Do you have any suggestions on how to fix it on Linux?

Thanks.
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Old 05-04-06, 03:07 AM   #11
mwr
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Default Re: 8174/8178, TwinView and Stereo on Quadro FX 4500

Hi,

I had problems not only with pulsar but with all OpenGL applications using stereo. pulsar was just an example. But I tried with the new driver 8756 and this works at least for me. pulsar works fine and all other OpenGL programs on Linux also work fine. So this bug seems to be fixed maybe even if the nvidia developpers didn't intend to fix it. :-) So thanks to them.

What doesn't work is forcing stereo for all OpenGL apps but this would be another thread I think.

Matthias
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