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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/256021

Title:
  glxinfo crashed with SIGSEGV in __libc_start_main()

Status in mesa package in Ubuntu:
  Fix Released
Status in mesa source package in Jaunty:
  Fix Released
Status in mesa source package in Karmic:
  Fix Released

Bug description:
  [Impact]

  Fixes segmentation faults in glXGetFBConfigs() that happen frequently
  when the nvidia binary drivers are present on the system (even if they
  are not in use) by adding a null pointer check. While the SEGV seems
  innocuous since it only happens with glxinfo, quite a few essential
  programs such as compiz use glxinfo to detect GL capabilities and this
  causes problems. This is fixed in Karmic which as of this time has
  mesa 7.4.1, but the issue still stands in jaunty's 7.4.

  [Symptoms]
  Segfaults in glxinfo. glxinfo reporting Xlib:  extension "GLX" missing on 
display.

  [Patch]
  http://launchpadlibrarian.net/28340399/mesa_7.4-0ubuntu3.2.debdiff

  [Test Case]
  In an affected system (such as one with nvidia drivers loaded)
  1.  Run glxinfo
  2.  Errors with a segfault
  3.  Attempt to start compiz
  4.  Fails to start because it can't run glxinfo

  [Regression Potential]
  Essentially none.  It simply adds a null pointer check right before 
dereferencing it.
  This fix has been tested in Karmic as well as upstream for some time, and was 
included in the 7.4.1 bugfix release.

  UPDATE:Oct 8 2008. installed daily updates ( 2.6.27-6-generic ) and
  still getting this same glxinfo error on boot

  
------------------------------------------------------------------------------------------------------------------------------------

  I was running PlayOnLinux and tried to install 3d acceleration from
  there when glxinfo crashed.

  Description:  Ubuntu intrepid (development branch)
  Release:      8.10

  mesa version : 7.1~rc3-1ubuntu2 (intrepid)

  ProblemType: Crash
  Architecture: i386
  DistroRelease: Ubuntu 8.10
  ExecutablePath: /usr/bin/glxinfo
  NonfreeKernelModules: nvidia
  Package: mesa-utils 7.1~rc3-1ubuntu2
  ProcAttrCurrent: unconfined
  ProcCmdline: glxinfo
  ProcEnviron:
   SHELL=/bin/bash
   PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
   LANG=en_US.UTF-8
  Signal: 11
  SourcePackage: mesa
  Stacktrace:
   #0  0x0804ad66 in ?? ()
   #1  0xb7d66685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
   #2  0x08048e81 in ?? ()
  StacktraceTop:
   ?? ()
   __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
   ?? ()
  ThreadStacktrace:
   .
   Thread 1 (process 7142):
   #0  0x0804ad66 in ?? ()
   #1  0xb7d66685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
   #2  0x08048e81 in ?? ()
  Title: glxinfo crashed with SIGSEGV in __libc_start_main()
  Uname: Linux 2.6.26-5-generic i686
  UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare

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