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[msp3k <peek@xxxxxxxxxxx>]

Public bug reported:

A user is attempting to use SSH to log into a remote Linux machine and
run Mathematica8, piping the X11 display back to her machine.  When she
does, Xorg crashes, logging her out.

Contents of Xorg.0.log.old show the following backtrace:

[600295.262]
Backtrace:
[600295.262] 0: /usr/bin/X (xorg_backtrace+0x26) [0x45cef6]
[600295.263] 1: /usr/bin/X (0x400000+0x5ad2a) [0x45ad2a]
[600295.263] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f1b97015000+0xfc60) [0x7f1b97024c60]
[600295.263] 3: /usr/bin/X (WriteToClient+0x25f) [0x46207f]
[600295.263] 4: /usr/bin/X (0x400000+0x38867) [0x438867]
[600295.263] 5: /usr/bin/X (ProcessWorkQueue+0x21) [0x436e41]
[600295.263] 6: /usr/bin/X (WaitForSomething+0x68) [0x464418]
[600295.263] 7: /usr/bin/X (0x400000+0x40f32) [0x440f32]
[600295.263] 8: /usr/bin/X (0x400000+0x21a7e) [0x421a7e]
[600295.263] 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xff) [0x7f1b95f5eeff]
[600295.263] 10: /usr/bin/X (0x400000+0x21629) [0x421629]
[600295.263] Segmentation fault at address 0xd80788
[600295.263]
Caught signal 11 (Segmentation fault). Server aborting

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
Uname: Linux 2.6.38-12-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Nov  2 11:18:05 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US:
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2.1
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty ubuntu

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https://bugs.launchpad.net/bugs/885275

Title:
  SSH + Mathematica8 = Xorg crash

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