Desktop freezes for some seconds then continues

[Alan Pope 🍺🐧🐱 🦄]

Working away on my up to date saucy x220 and it just freezes up. I can see no screen updates for about 10 seconds. Then the system carries on with some flicker (which I assume is unity / compiz / something crashing).

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity 7.1.0+13.10.20130812.1-0ubuntu1
Uname: Linux 3.10.3-031003-generic x86_64
ApportVersion: 2.12-0ubuntu3
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,grid,imgpng,gnomecompat,scale,workarounds,mousepoll,regex,wall,move,place,vpswitch,resize,unitymtgrabhandles,snap,session,expo,ezoom,unityshell]
Date: Tue Aug 13 13:33:53 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-06-29 (409 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: unity
UpgradeStatus: Upgraded to saucy on 2013-07-12 (31 days ago)

[Alan Pope 🍺🐧🐱 🦄 (popey)]

After the crash my screen is corrupted in various ways as detailed at bug 1189850

[Alan Pope 🍺🐧🐱 🦄 (popey)]

Tried 3.11.0-994-generic but it still happens. Although it's certainly happened less frequently today, or I've not noticed it.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]