[Chimera-users] xfowarding not working in new chimera

Greg Couch gregc at cgl.ucsf.edu
Tue Apr 13 13:47:51 PDT 2010

You are correct to suspect a Mesa library problem.  We have worked 
around the remote display problems before by installing the NVidia (and 
dependencies) on the remote computer.  If you don't want to override the 
system version of libGL.so, then put it in a different directory and set 
the LD_LIBRARY_PATH environment variable to that directory before 
running chimera.

If you want to try an isolate the part of OpenGL that is causing the 
problem, start chimera with the --debug-opengl command line option and 
press the Disable All button to disable many OpenGL features, and then 
Start Chimera.  If opening a PDB file works, then you can experiment 
turning OpenGL features back on until chimera fails again.  You can 
speed up the search if you're familiar with OpenGL and start chimera 
with the --debug command line option -- in that case, it should reliably 
fail in the same place and the error message should indicate the part of 
OpenGL that is causing problems.

As for running chimera on NX client, I didn't see any mention of OpenGL 
support on the NX Server feature page, so you're probably out of luck.  
If you want to display remotely on a Windows computer, you can install a 
X server that supports OpenGL, like Xming or Exceed 3D.

     - Greg

On 04/09/2010 05:42 PM, Kenneth Frankel wrote:
> My older version of chimera x forwards with no problem;
> from the about ucsf chimera window
> its beta version 1 build 2064   2004/12/15 for linux2
> We have upgraded the 32 and 64 bit version which run fine locally.
> but when we run from another computer with ssh either
> with
> -X, -Y, -XY , -o ForwardX11=yes frankel at graphics1
> we always get a crashe after trying to do something (e.g fetch a pdb) 
> with the same genral error message
> frankel at graphics1:/home/frankel 102% 
> /programs/chimera-1.4.1-x86_64/bin/chimera
> X Error of failed request:  BadRequest (invalid request code or no 
> such operation)
>   Major opcode of failed request:  144 (GLX)
>   Minor opcode of failed request:  181 ()
>   Serial number of failed request:  5374
>   Current serial number in output stream:  5379
> (serial numbers may differ between runs)
> Can this be fixed? (We suspect it's a mesa library problem).
> Also when running nx client, even the old version of chimera from crashes.
> I'll have to get the error message later, but does anyone have 
> experience running over nx client?
> we've gotten pymol, and vmd to work.
> thanks
> Ken Frankel
> _______________________________________________
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> Chimera-users at cgl.ucsf.edu
> http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users

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