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[Scott Moser <smoser@xxxxxxxxxx>]

Chris seems to have correctly identified the issue.
I tried reverting the xserver-xorg-video-intel to previous versions, but it had no affect.

I rebooted into an older kernel and i can still use compiz/unity.

 3.16.0-6-generic : works
 3.16.0-7-generic : fails
 3.16.0-8-generic: fails

** Summary changed:

- unity crashes on login, compiz cpu and memory intensive
+ compiz fails with intel_do_flush_locked failed: Invalid argument

** No longer affects: unity (Ubuntu)

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https://bugs.launchpad.net/bugs/1355196

Title:
  compiz fails with intel_do_flush_locked failed: Invalid argument

Status in “linux” package in Ubuntu:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  New

Bug description:
  Recent upgrade and reboot/re-login left me with a generally unusable compiz/unity.
  On login, the desktop icons move back and forth several times, I believe this correlates with ~/.xesssion-errors 'unity main process ended' messages like:
  upstart: unity7 main process (7477) terminated with status 1
  upstart: unity7 main process ended, respawning
  upstart: unity7 main process (7910) terminated with status 1
  upstart: unity7 main process ended, respawning
  upstart: unity7 main process (7939) terminated with status 1

  
  Further investigation showed that compiz was failing to start.  Attempting to start it by hand shows:
    intel_do_flush_locked failed: Invalid argument

  Those same messages appear in ~/.cache/upstart/unity7.log.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: unity 7.3.0+14.10.20140731.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.16.0-6.11-generic 3.16.0-rc7
  Uname: Linux 3.16.0-6-generic x86_64
  ApportVersion: 2.14.5-0ubuntu4
  Architecture: amd64
  CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,snap,commands,mousepoll,grid,move,place,imgpng,session,vpswitch,resize,regex,gnomecompat,unitymtgrabhandles,wall,resizeinfo,animation,workarounds,fade,scale,expo,ezoom,unityshell]
  CurrentDesktop: Unity
  Date: Mon Aug 11 09:53:07 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-10-19 (1027 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  SourcePackage: unity
  UpgradeStatus: Upgraded to utopic on 2013-05-20 (448 days ago)

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