Re: 3d vision xinerama/twinview
I spent some more time and I finally figured out I can make this work by starting X with only the stereo display configured and then enabling the second non-stereo display with nvidia-settings using twinview. Starting with both monitors enables causes the driver to disable stereo. It complains about the modelines need to be identical (which I see is mentioned in the README).
We're still testing, but it would seem everything works as expected. The stereo output is working correctly on the stereo monitor. I've added the TwinViewXineramaInfoOverride option, so the window manager applications know about the layout as well.
Would it be possible to at least have an experimental option to force stereo on with different modelines? This is really a much more ideal configuration than the alternatives. It seems strange to disable stereo with different monitors on startup, but then it works ok when added dynamically.