** Description changed:

  After connecting/disconnecting second monitor displays  start blinking
  when something changes on screen.
+ 
+ After restarting X displays stop blinking.
  
  $ lsb_release -rd
  Description:  Ubuntu Raring Ringtail (development branch)
  Release:      13.04
  
  $ apt-cache policy xorg
  xorg:
-   Installed: 1:7.7+1ubuntu4
-   Candidate: 1:7.7+1ubuntu4
-   Version table:
-  *** 1:7.7+1ubuntu4 0
-         500 http://us.archive.ubuntu.com/ubuntu/ raring/main i386 Packages
-         100 /var/lib/dpkg/status
+   Installed: 1:7.7+1ubuntu4
+   Candidate: 1:7.7+1ubuntu4
+   Version table:
+  *** 1:7.7+1ubuntu4 0
+         500 http://us.archive.ubuntu.com/ubuntu/ raring/main i386 Packages
+         100 /var/lib/dpkg/status
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
  Uname: Linux 3.8.0-16-generic i686
  .tmp.unity.support.test.0:
-  
+ 
  ApportVersion: 2.9.2-0ubuntu5
  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: Sun Apr  7 14:03:19 2013
  DistUpgraded: 2013-04-05 16:52:01,202 DEBUG enabling apt cron job
  DistroCodename: raring
  DistroVariant: ubuntu
  DkmsStatus: vboxhost, 4.2.10, 3.8.0-16-generic, i686: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
-  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
-    Subsystem: Lenovo Device [17aa:21fa]
+  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
+    Subsystem: Lenovo Device [17aa:21fa]
  InstallationDate: Installed on 2012-11-27 (131 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
  MachineType: LENOVO 2306CTO
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-16-generic 
root=UUID=5257adbd-5671-40b9-b4d1-2648983e2c96 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to raring on 2013-04-05 (1 days ago)
  dmi.bios.date: 09/11/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET82WW (2.02 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 STD DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrG2ET82WW(2.02):bd09/11/2012:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.9~daily13.04.05-0ubuntu1
  version.libdrm2: libdrm2 2.4.43-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.7-0ubuntu1
  xserver.bootTime: Sun Apr  7 14:02:42 2013
  xserver.configfile: default
  xserver.errors:
-  
+ 
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.13.3-0ubuntu4
  xserver.video_driver: intel

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https://bugs.launchpad.net/bugs/1165723

Title:
  After connecting/disconnecting second monitor displays  are blinking

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