From: John Stone (
Date: Fri Jun 12 2009 - 10:02:33 CDT

  Can you send me the VMD startup messages you get when you
display on the remote machine? The description you're giving
sounds like they've somehow created a new bug/problem with
OpenGL double buffering. I don't recall if glxgears is using
double buffering or not, so the lack of trouble there may
not be indicative of anything. If you send me the VMD startup
messages, it will tell me more about what features their X11
server implementation is advertising to the client Linux system,
and with this we may be able to narrow down the source of the problem.

  John Stone

On Fri, Jun 12, 2009 at 04:48:29PM +0200, Benjamin Bouvier wrote:
> Hi all,
> I usually run VMD on a remote Linux machine (cluster frontend) and use
> MacOs's X11 implementation to forward the display to my MacBook Pro. This
> used to work fine.
> No so since I upgraded MacOS from 10.5.6 to the latest 10.5.7. The
> contents of the VMD OpenGL window flash very quickly (one frame is white,
> the second one is the actual VMD rendering), making VMD unusable. This
> occurs with VMD 1.8.6 and 1.8.7, both 32 and 64 bits.
> I read that Apple had done modifications to X11 in 10.5.7. However, the
> problem seems limited to VMD : glxgears for instance is forwarded OK, as
> are all non-openGL windows (including the VMD Main window).
> Are there any other users experiencing this ? Is there a simple cure ?
> Thanks,
> --
> Benjamin Bouvier

NIH Resource for Macromolecular Modeling and Bioinformatics
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