xfwm4 would randomly crash on an LTSP server setup

[Fanying]

We have an LTSP server setup with 77 terminals. The server is a brand new SuperMicro server with 32 CPU physical cores and 512GB of memory.

With some regularity, the windows manager xfwm4 would just crash and the title bar would disappear. We used workarounds such as xfwm4 --replace or run it manually off the terminals but these are not solutions. It appears to be a software bug interacting with LTSP as we only see this problem on LTSP. Desktops and Laptops with single user Ubuntu 12.04 running xfce4 never exhibit this issue.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xfwm4 4.8.3-1ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-59.90-generic 3.2.54
Uname: Linux 3.2.0-59-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Fri Mar 28 16:05:34 2014
MarkForUpload: True
SourcePackage: xfwm4
UpgradeStatus: No upgrade log present (probably fresh install)

[Thaddaeus Tintenfisch (thad-fisch-deactivatedaccount)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please try to obtain a backtrace following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

[Launchpad Janitor (janitor)]

[Expired for xfwm4 (Ubuntu) because there has been no activity for 60 days.]