[chimera-dev] stereo: Linux, nvidia Quadro FX 5600

[Dave Rager]

Hello,
I recently experienced this same problem with a similar card.

I haven't seen the exact fix posted anywhere but this thread pointed
me in the right direction so I figured I'd post what I needed to do to
fix this...

With glxgears I'd get:
glxgears -stereo
Error: couldn't get an RGB, Double-buffered, Stereo visual

With http://astronomy.swin.edu.au/~pbourke/opengl/stereogl/pulsar.c:
./pulsar -s
ERROR: Internal error <Visual with necessary capabilities not found>
in function fgOpenWindow

>From the /usr/share/doc/NVIDIA_GLX-1.0/README.txt:

   o Workstation overlays, stereo visuals, and the unified back buffer (UBB)
     are incompatible with Composite. These features will be automatically
     disabled when Composite is detected.

Simply running: "nvidia-xconfig --no-composite" fixed it.

Looks like it added the following to xorg.conf:

Section "Extensions"
    Option         "Composite" "Disable"
EndSection

Hopefully this helps anyone else with this problem...

Thanks,
Dave.

***************************
On Fri, 17 Apr 2009, Randy Heiland wrote:

Hello again gang,

I'm guessing someone there can help me get past this - I know Greg has
offered advice elsewhere.

My subject line says it all - I want to get stereo working on this
machine.  Trying something more basic than chimera:

$ glxgears -stereo
Error: couldn't get an RGB, Double-buffered, Stereo visual

$ glxinfo -v|grep stereo
    bufferSize=32 level=0 renderType=rgba doubleBuffer=1 stereo=0
    bufferSize=32 level=0 renderType=rgba doubleBuffer=1 stereo=0
...

It's not obvious to me where/how one enables stereo via  System->Prefs-
>More Prefs->nvidia x server settings

The specs:
Linux-x86_64
nvidia driver version:  180.29

GPU 0 (Quadro FX 5600)
mem 1536 MB
PCI Express 16x
X screens: Screen 0
Display: Apple Cinema HDDisplay (DFP-1)

GPU 1 (Quadro NVS 290)
256 MB
PCI Express 16x
X screens: none
Display: none

with an Apple 30" Cinema HDDisplay currently attached (and a ViewSonic
Fuhzion, 120Hz as something else to experiment with).  Currently have
CrystalEyes.

I'd welcome any advice you might have.
thanks, Randy