From: John Stone (
Date: Thu Jan 12 2017 - 12:20:50 CST

  I just saw your more recent posting about driver problems caused
by conflicts between nouveau and the commercial NVIDIA drivers.
I assume that perhaps the problems with stereo below are/were closely
related to this? Did correcting the NVIDIA driver installation solve
the issues with stereoscopic display as well?

In general the nouveau driver is far behind where it would
need to be to be usable with VMD. I doubt that the nouveau driver
supports stereo at all, so that may explain the issues below if there
were remnants of the nouveau driver on your system when you ran the
tests described below. In any case, if you look at the /var/log/Xorg.0.log
files produced by the X server during startup, that would likely make it
clear which driver was loaded at the time, and problem(s) it had with
the display configuration.

  John Stone

On Wed, Jan 11, 2017 at 11:15:32AM +0100, Vlad Cojocaru wrote:
> Dear all,
> I know this may not be a VMD-related question per se (more of an NVIDIA
> question). Sorry for this. However, maybe some of you has experience
> with this setup and could give me a hint. I would like to get Quad
> Buffered Stereo in VMD wtih NVIDIA 3 D vision on the following
> Linux-based setup:
> I have a Quadro M4000 and 2x 27-inch monitors (3D ready). One of these
> has a DisplayPort (DP) entry, so I connect the DP to the Quadro DP and
> everything seems fine.
> However the second monitor has only HDMI and DVI entries (the M4000 has
> only DP, no DVI). Whenever I connect the monitor HDMI to the Quadro DP,
> the NVIDIA driver (375.26, also earlier) only recognizes the 60 Hz
> refresh rate of the monitor. Enabling Stereo option in xorg.conf ("10")
> literally disables the second monitor. The same if I connect the monitor
> DVI to the Quadro DP with a standard DVI-DP adapter.
> In the past, I have used the dual link DVI-DP adapters and this worked,
> albeit with intervals of weird display issues on the monitor connected
> through these adapters.
> Does any of you have any idea about a simple way (avoiding the dual link
> DVI-DP adapters) to get the stereo working on an HDMI/DVI monitor
> connected to a DP-only Quadro card ?
> Thanks for any insights and sorry again for the slight off-topic question.
> Best wishes
> Vlad
> --
> Vlad Cojocaru, Ph.D., Project Group Leader
> Department of Cell and Developmental Biology
> Max Planck Institute for Molecular Biomedicine
> Röntgenstrasse 20, 48149 Münster, Germany
> Tel: +49-251-70365-324; Fax: +49-251-70365-399
> Email: vlad.cojocaru[at]

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