Malcolm,
Yes, a reasonable person might expect it to work...but we have tried on both
Mac and Linux, and it doesn't work with either CystalEyes or NuVision hardware.
I don't think Modeline timings have any meaning when generating a true digital
display signal, but regardless, the actual sync signal output is not correct.
My naïve guess is that this is because the analog sync signal from the Quadro
DIN connector is based off of the SVGA vertical blanking interval and has
nothing to do with the digital-only display signal required by these displays.
Note that these displays do not accept an analog SVGA signal - they have only a
pure-digital DVI-D connector - not DVI-I, and they have no HD15 SVGA input.
They also require a full dual link DVI-D cable with all pins present. It seems
that the dual-link capacity is used to carry the 120 Hz signal (perhaps split
over two regions of the display? or with the left 60Hz on one channel and the
right 60Hz on the other?).
Furthermore, even if the Quadro sync was correct, the polarization of the old
shutter glasses conflicts with that of the liquid crystal. I also observed
that light from the Samsung LCD seems to interfere with the old CrystalEyes
sync signal. Of course, the other problem is that affordable Quadro cards do
not even come with a sync connector.
So in summary, there seem to be many problems combining modern LCDs with old
stereo 3D hardware, which presumably explains in part why nVidia decided to
introduce a new USB emitter and glasses for use with these displays.
Cheers,
Warren
________________________________
From: Davis, Malcolm [mailto:malcolm.da...@bms.com]
Sent: Friday, July 17, 2009 2:00 PM
To: pymol-users@lists.sourceforge.net
Subject: Re: [PyMOL] WARNING: No Mac or Linux support for 120 HzLCD
synchronization
Has anyone tried these with the old CrystalEyes glasses? We are looking to get
one of these to try, but it is hard to understand why there should even be a
need for a different graphics driver or a newer Quadro card to use it that way.
The FX1100 cards we still have in some of our Linux workstations can be
configured to send a 1600x1...@100hz signal to our old IBM c220p monitors and
the 100Hz limit was from the monitor not the graphics card. So other than
needing to specify the Modeline manually in the X config files, why shouldn't
this just work?
Malcolm
From: Warren DeLano [mailto:war...@delsci.com]
Sent: Friday, July 17, 2009 12:23 PM
To: pymol-users@lists.sourceforge.net
Subject: [PyMOL] WARNING: No Mac or Linux support for 120 Hz LCD synchronization
Just to make sure everyone understands:
Stereo 3D support for these awesome new 120 Hz LCD displays is WINDOWS ONLY due
to the need of a special USB driver for the 3D Vision sync emitter.
Unfortunately, you cannot sync a digital 120 Hz LCD using the old stereo analog
DIN sync connector - it just doesn't work.
Please do not waste money right now buying a 120 Hz LCD if you use Linux or Mac
OS (even if you have a Quadro card), or if you use a Windows laptop (without a
Quadro graphics chip). You will be disappointed -- the display will not do 3D
with your system, and nVidia has not promised support for 120 Hz LCD
synchronization on platforms other than Windows. That may change, but then
again, it might not.
Accordingly, our recommended stereo 3D solution for Mac, Linux, and for Windows
systems without Quadro cards is the Zalman M220W LCD display. You get fewer
pixels for stereo 3D, but it works great with PyMOL on ALL PLATFORMS (including
most laptops). No special graphics hardware or drivers are required to use the
Zalman with PyMOL. http://pymol.org/zalman
Cheers,
Warren
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