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Old 11-14-03, 03:13 AM   #1
kostrewd
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Join Date: Nov 2003
Posts: 3
Default stereo inversion with quadro4 980 XGL

Dear Nvidia/Linux users,

I've got an annoying effect under RedHat 9.0 with a Nvidia Quadro4 980 XGL
graphics card, the most recent Nvidia driver 1.0-4496 and Stereographics glasses &
emitter: rather frequently, the hardware stereo is inverted (back appears in front
and vice versa) and comes back occasionally to normal mode. I've already set (and exproted) the
environment variable "__GL_SYNC_TO_VBLANK=On", and in the XF86config I've
defined the Device as follows:

Section "Device"
Identifier "Nvidia1"
BoardName "Quadro4 980 XGL"
Driver "nvidia"
Option "stereo" "3"
Option "NvAgp" "1"
Option "UBB" "On"
Option "PageFlip" "On"
Option "WindowFlip" "On"
BusID "PCI:1:0:0"
EndSection

This happens also without explicitly setting the UBB, PageFlip and WindowFlip options.

I've got an iiyama HM204DT monitor and use a gtf modeline with 120 Hz for stereo mode,
but this happened also on my previous Siemens MCM 21T1 using 100 Hz, only
(which was too low for conveniently working in stereo).

Do you have any idea what's going wrong here? Maybe, this is a driver bug?

I would be very grateful for any hint!

Best regards,

Dirk.
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Old 11-17-03, 08:09 AM   #2
kostrewd
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Default

Dear Nvidia/Linux users

it seems that I've "solved" the stereo inversion issue: I've errornously set and exported __GL_SYNC_TO_VBLANK environment variable in my .bash_profile (assuming it will be inherited to all sub-shells). Setting and exporting it in my .bashrc solved this stereo inversion problem.

Good luck,

Dirk.
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Old 11-24-03, 05:13 AM   #3
kostrewd
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Default

No, the stereo inversion problem still persists (but appeared somewhat less frequently) even with setting the __GL_SYNC_TO_VBLANK in the .bashrc file.
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