To get a little more information, run chimera from the command line with the --debug flag. Where the segmentation fault occurs will give us a clue as to what's going wrong. That said, the usual cause is that the OpenGL libraries are messed up or missing, i.e., if either glxgears or glxinfo segmentation faults, then it's not a chimera problem. We haven't tested RHEL6 yet, but if it is like RHEL5, then you need to have an AMD/ATI or NVidia graphics card in your computer and install the associated proprietary driver. The open-source OpenGL drivers are much better than they used to be, but Red Hat does not keep the mesa (OpenGL) package current, you have to use the latest Fedora for that, and if you Intel graphics, then you really need a current mesa package. Good luck! Greg On 12/16/2011 1:13 PM, Starr Hazard wrote:

Folks,

I have a chimera 1.41 running on an oldercluster head node with RHEL 4 something so its been a while since I did this procedure....

I have a newer cluster based on RHEL 6.1. When I try to launch either 1.5.3 or the alpha daily build I see the initial chimera banner but then only a text message reporting segmentation fault. Should these chimera's crash due to the fact that they are RHEL 5 compatible or is it something in my X11 setup?

Will there be a log file anywhere that would provide clues? Where would that file be located?

Thanks

Starr