VMD-L Mailing List

From: Norman Geist (norman.geist_at_uni-greifswald.de)
Date: Tue Sep 17 2013 - 05:23:26 CDT

Hi,

I think this happens due different graphics driver versions on the machines.

Norman Geist.

> -----Ursprüngliche Nachricht-----
> Von: owner-vmd-l_at_ks.uiuc.edu [mailto:owner-vmd-l_at_ks.uiuc.edu] Im
> Auftrag von Clarinet
> Gesendet: Montag, 16. September 2013 16:40
> An: vmd-l_at_ks.uiuc.edu
> Betreff: vmd-l: Certain combinations of X-server and X-client do not
> allow VMD to start
>
> Hi all,
>
> We have two servers with VMD installed and several workstations that
> call it remotely, i.e. users start VMD on the server and let it open
> windows on their workstation using X11 redirection via ssh tunnel.
>
> For most combinations of servers and workstations everything is fine,
> but there are certain pairs that do not allow VMD to start saying:
>
> Info) VMD for LINUXAMD64, version 1.9.1 (February 1, 2012)
> Info) http://www.ks.uiuc.edu/Research/vmd/
> Info) Email questions and bug reports to vmd_at_ks.uiuc.edu
> Info) Please include this reference in published work using VMD:
> Info) Humphrey, W., Dalke, A. and Schulten, K., `VMD - Visual
> Info) Molecular Dynamics', J. Molec. Graphics 1996, 14.1, 33-38.
> Info) -------------------------------------------------------------
> Info) Multithreading available, 4 CPUs detected.
> Info) Free system memory: 11154MB (92%)
> Warning) Detected a mismatch between CUDA runtime and GPU driver
> Warning) Check to make sure that GPU drivers are up to date.
> Info) No CUDA accelerator devices available.
> Warning) Detected X11 'Composite' extension: if incorrect display
> occurs
> Warning) try disabling this optional X server feature.
> ERROR) A TrueColor visual is required, but not available.
> ERROR) The X server is not capable of displaying double-buffered,
> ERROR) RGB images with a Z buffer. Exiting ...
> Info) VMD for LINUXAMD64, version 1.9.1 (February 1, 2012)
> Info) Unable to create OpenGL window.
>
> So workstation A is able to run VMD from server X as well as Y, but
> workstation B can only run VMD from server X, running VMD form Y fails
> with the above message. Both installations of VMD (on servers X and Y)
> are identical (version 1.9.1).
>
> What can be the problem? Can it be somehow connected to the issue we
> have been discussing some time ago
> http://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/21153.html ?
> Some
> of the workstations that have the current problem also suffered from
> the
> previous one, but we cannot confirm that it is a general rule.
>
> Best regards,
>
> Jiri Polach