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[Saeid Yazdani <embedonix@xxxxxxxxx>]

I confirm this as it happens to me quite a lot!

But in my case, if any application is in fullscreen mode (e.g. skype,
QtCreator, Android Studio...) and if I try to switch between wrkspaces
by ctrl-alt-arrow keys, compiz cpu utilization goes to 100% and there is
no escape from it! only solution is hard reset...going to a terminal
does not always work in a terminal and my computer does not respond at
all.

Dell Vostro 1530
Ubuntu 14.04.01?? 64
NVIDIA G 9300m, 331 drivers

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

Title:
  Desktop occasionally freezes/locks up when switching workspaces

Status in Compiz:
  Confirmed
Status in Compiz Main Plugins:
  Invalid
Status in Compiz Desktop Wall Plugin:
  Invalid
Status in OEM Priority Project trusty series:
  Invalid
Status in compiz package in Ubuntu:
  Confirmed
Status in compiz-plugins-main package in Ubuntu:
  Invalid

Bug description:
  I'm assuming the issue is related to Compiz, but I'm not 100% sure.
  When I'm switching workspaces, it occasionally locks up (becoming more
  frequent). Most of the time, I'm going from the current one down
  (Ctrl+Alt+Down Arrow), and it freezes mid slide. Typically, I'm able
  to correct things by backing out to a terminal then returning
  (Ctrl+Alt+F1, pause, Alt+F7), but sometimes when I return the dual
  screen setup acts as one large screen (windows are stretched to the
  full width of both screens) and many of the windows collect on the
  first workspace.

  
  Ubuntu 11.04 (Classic)
  All packages up-to-date.

  If there are any logs/etc that would be helpful, let me know.
  --- 
  Architecture: amd64
  CompizPlugins: [core,bailer,detection,composite,opengl,decor,grid,imgpng,snap,compiztoolbox,resize,place,regex,move,gnomecompat,animation,vpswitch,mousepoll,workarounds,session,expo,wall,ezoom,fade,switcher,scale]
  DistroCodename: natty
  DistroRelease: Ubuntu 11.04
  DistroVariant: ubuntu
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  InstallationMedia_: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  NonfreeKernelModules: nvidia
  Package: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
  ProcVersionSignature_: Ubuntu 2.6.38-10.46-generic 2.6.38.7
  Tags:  natty natty ubuntu
  Uname: Linux 2.6.38-10-generic x86_64
  UnreportableReason: Please work this issue through technical support channels first.
  UpgradeStatus: Upgraded to natty on 2011-05-02 (84 days ago)
  UserGroups: adm admin audio cdrom dialout dip fuse lpadmin netdev plugdev sambashare

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