Public bug reported:

If I launch xmgrace, it causes the entire desktop to become unresponsive
(one update per 5 seconds).

If I switch to a non-graphical terminal then back it "cures" the hang
until I again try to use xmgrace (open a dialogue window, close xmgrace
etc.). I've found that if I log in using ubuntu 2D mode, xmgrace is
responsive and X does not hang.

When I run xmgrace under strace, it appears to hang during communication
with X. Even when running under ubuntu-2D mode there is a lot of EAGAIN
responses on the X socket. This may be a red herring though as I have
very little experience with the X protocol.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: grace 1:5.1.22-12
ProcVersionSignature: Ubuntu 3.2.0-45.70-generic 3.2.44
Uname: Linux 3.2.0-45-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
Date: Tue Jun 11 10:46:42 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: grace
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug precise running-unity

** Attachment added: "Strace log for xmgrace under ubuntu-2D"
   https://bugs.launchpad.net/bugs/1189835/+attachment/3700671/+files/strace.log

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https://bugs.launchpad.net/bugs/1189835

Title:
  xmgrace hangs on load when Unity is in 3D mode

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