After resuming my laptop, I can no longer bring up the dash (screenshot attached) and alt+tab windows are not appearing (but I am able to alt+tab between applications).
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.tmp.unity.support.test.0:
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,imgpng,vpswitch,snap,regex,unitymtgrabhandles,resize,mousepoll,animation,gnomecompat,expo,grid,place,workarounds,move,ezoom,session,wall,fade,scale,unityshell]
CompositorRunning: compiz
DistUpgraded: Log time: 2011-10-01 14:24:51.484114
DistroCodename: oneiric
DistroRelease: Ubuntu 11.10
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:0209]
Subsystem: Dell Device [1028:0209]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: Dell Inc. XPS M1330
Package: unity 4.22.0-0ubuntu3
PackageArchitecture: i386
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=2e1dae2d-129a-4848-ab4f-912d2776f156 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric running-unity oneiric running-unity oneiric running-unity ubuntu compiz-0.9
Uname: Linux 3.0.0-12-generic-pae i686
UpgradeStatus: Upgraded to oneiric on 2011-10-01 (9 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare
dmi.bios.date: 07/08/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0N6705
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd07/08/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0N6705:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
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
apport information