[Chimera-users] Running/opening issue of chimera on HPC login node

Greg Couch gregc at cgl.ucsf.edu
Tue Jul 13 10:33:42 PDT 2021

Hello Rajiv,

While running OpenGL remotely should work, as you see it often doesn't.  
It occasionally does work, usually when the remote version of OpenGL and 
the local version of OpenGL are exactly the same.

The best solution I've seen for running Chimera or ChimeraX on a remote 
Linux server is to use VirtualGL.  That side steps all of the issues of 
trying to do OpenGL remotely by doing all of the 3D graphics on the 
Linux server and returning an image.  It helps if there is a graphics 
card in the Linux server.  VirtualGL has to be installed on the Linux 
server for that to work, and it is a little tricky to install correctly, 
but it is the best solution.  Contact your cluster support for help with 
that.  Otherwise, try making your computer exactly the same 
configuration as the Linux server, same version of Linux, same graphics 
driver (ie., if the server has NVidia 419, you need to have NVidia 419).

Sorry, I have to comment on the anti-social behavior of using a cluster 
login node for running Chimera.  I trust that was just an example or 
that you're not sharing the login node with other users.  If your 
cluster has interactive/development nodes, those would be the right 
nodes to use and it might be the case that VirtualGL is already 
installed on those.  If VirtualGL is installed, then run "vglrun 
chimera" instead of "chimera".

     All the best,


On 7/13/2021 6:46 AM, Rajiv Ranjan Singh via Chimera-users wrote:
> I am trying to open/run chimer; installed on a cluster login node 
> without root privilege. Installed in Home//.local/UCSF-Chimera64-1.15rc/
> Getting the following error.
> *login1:*~/.local/UCSF-Chimera64-1.15rc/bin $ ./chimera
> libGL error: unable to load driver: swrast_dri.so
> libGL error: failed to load driver: swrast
> X Error of failed request:  BadValue (integer parameter out of range 
> for operation)
>   Major opcode of failed request:  152 (GLX)
>   Minor opcode of failed request:  3 (X_GLXCreateContext)
>   Value in failed request:  0x0
>   Serial number of failed request:  716
>   Current serial number in output stream:  717
> Kindly advise me to rectify this issue.
> Best,
> Rajiv Ranjan Singh
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