Public bug reported:

When my laptop is not connected to an external monitor and I click the
Workspace Switcher, the "zoom out" effect to show all workspaces works
properly. When I connect a monitor to my DisplayPort output and click
Workspace Switcher, the laptop's built-in monitor shows a messed-up
background (see attachment) and the external monitor shows no
background.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.20.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,snap,grid,mousepoll,compiztoolbox,resize,imgpng,wall,unitymtgrabhandles,regex,gnomecompat,place,vpswitch,move,animation,workarounds,expo,session,ezoom,fade,scale,unityshell]
CompositorRunning: compiz
Date: Sat Oct  1 07:38:07 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] 
(rev 12) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:172a]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110921.2)
MachineType: Hewlett-Packard HP EliteBook 8440p
PccardctlIdent:
 Socket 0:
   product info: "RICOH", "Bay8Controller", "", ""
   manfid: 0x0000, 0x0000
   function: 254 (unknown)
PccardctlStatus:
 Socket 0:
   3.3V 16-bit PC Card
   Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcEnviron:
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic 
root=UUID=26780926-1f18-4056-ae79-bf1656287393 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/22/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CCU Ver. F.02
dmi.board.name: 172A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 30.29
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnHewlett-Packard:bvr68CCUVer.F.02:bd12/22/2009:svnHewlett-Packard:pnHPEliteBook8440p:pvr:rvnHewlett-Packard:rn172A:rvrKBCVersion30.29:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8440p
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20110411+8378443-1

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


** Tags: amd64 apport-bug compiz-0.9 oneiric running-unity ubuntu

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https://bugs.launchpad.net/bugs/864037

Title:
  workspace switcher zoom failure with multiple monitors

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