i've been having this problem for a long time.  Using Ubuntu 12.04
presently.  i tried the instructions in #49 but got this:

$ sh ./dstack compiz >> compizstack.txt
Could not attach to process.  If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user.  For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operation not permitted.
/home/smcoll/2543: No such file or directory.
Thread ID 1 not known.
/tmp/dstackscript9590:4: Error in sourced command file:
No stack.

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https://bugs.launchpad.net/bugs/815996

Title:
  Desktop occasionally freezes/locks up when switching workspaces

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