Original bug was in the PutImage path. This new crash is in the software Mesa path.
This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unfortunately unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux.
This is a long shot, but this bug is ringing some faint bells. The initial report says the bug occurs when Xvfb is launched like this: # /usr/bin/Xvfb :3 -screen 3 1280x1024x24 -fbdir /var/tmp Two questions: 1) Does it work if you change the -screen argument to "-screen 3 1280x1024x24+32" ? 2) Does it work if you append "-extension COMPOSITE" to the command line?
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0083.html