Public bug reported:

Often when using unity search tool (top button) a rapid page 
painting/corruption occurs often resulting in a lockup requiring reboot.
Not sure exactly how it originates. but the repainting can go on for some time 
with frozen mouse and frozen keyboard(cannot call for term) ctrl+alt+T not 
usable for term and reboot.
 CPU seems to be frozen. occasionaly have got up sys mon and CPU load stuck at 
100%.
got a screen shot (attached)

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Uname: Linux 3.11.0-17-generic i686
.tmp.unity.support.test.0:
 
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Mon Mar  3 14:24:36 2014
DistUpgraded: 2014-02-15 22:23:42,539 DEBUG enabling apt cron job
DistroCodename: saucy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation NV41M [GeForce Go 6800] [10de:00c8] (rev a2) (prog-if 00 
[VGA controller])
   Subsystem: Dell Device [1028:019c]
InstallationDate: Installed on 2014-02-16 (15 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
MachineType: Dell Inc. Inspiron 9300
MarkForUpload: True
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-17-generic 
root=UUID=d84f067c-19fd-4c34-9442-f95d63e6d6b9 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to saucy on 2014-02-16 (15 days ago)
dmi.bios.date: 06/21/2005
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0C5668
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA04:bd06/21/2005:svnDellInc.:pnInspiron9300:pvr:rvnDellInc.:rn0C5668:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 9300
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1

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


** Tags: apport-bug compiz-0.9 corruption i386 saucy ubuntu

** Attachment added: "Screen corruption CPU lockup"
   
https://bugs.launchpad.net/bugs/1287380/+attachment/4005723/+files/Screenshot%20from%202014-03-03%2014%3A21%3A00.png

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https://bugs.launchpad.net/bugs/1287380

Title:
  Screen  corruption Unity search

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