Public bug reported:

Unity crashed when I was upgrading from 11.10 to 12.04.

To reproduce:
1) From a terminal on an 11.10 system, run update-manager -d and follow the 
prompts to upgrade to 12.04.
2) While the upgrade is running, continue to use open applications like the 
browser
3) Unity crashes

I switched to a VT and saw this in dmesg:

[ 2809.521256] compiz[1820]: segfault at b0 ip 00007f61ee688b73 sp
00007fff4cfbdcd0 error 4 in libunityshell.so
(deleted)[7f61ee526000+225000]

Previous unity version was 4.28.0-0ubuntu2 from oneiric-proposed.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.0.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  280.13  Wed Jul 27 16:53:56 
PDT 2011
 GCC version:  gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:
 
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: 
[core,bailer,detection,composite,opengl,compiztoolbox,imgjpeg,decor,snap,imgpng,place,dbus,session,mousepoll,regex,commands,vpswitch,wall,neg,move,gnomecompat,resize,imgsvg,resizeinfo,text,animation,workarounds,fade,expo,scale,ezoom,scaleaddon]
CompositorRunning: compiz
Date: Thu Jan 26 16:33:49 2012
DistUpgraded: Log time: 2012-01-26 16:01:56.788410
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.1.2, 3.0.0-14-generic, x86_64: installed
 virtualbox, 4.1.2, 3.0.0-15-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Apple Computer Inc. Device [106b:00a0]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
MachineType: Apple Inc. MacBookPro3,1
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic 
root=UUID=4b3d81ed-fb5d-4946-97c0-ec537e1bfa3f ro quiet splash vt.handoff=7
SourcePackage: unity
UnitySupportTest: Error: command ['/usr/lib/nux/unity_support_test', '-p', 
'-f'] failed with exit code -11:
UpgradeStatus: Upgraded to precise on 2012-01-26 (0 days ago)
XorgConf:
 Section "Device"
        Identifier      "Default Device"
        Option  "NoLogo"        "True"
 EndSection
dmi.bios.date: 03/05/08
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP31.88Z.0070.B07.0803051658
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4238BC8
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 2
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F4238BC8
dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP31.88Z.0070.B07.0803051658:bd03/05/08:svnAppleInc.:pnMacBookPro3,1:pvr1.0:rvnAppleInc.:rnMac-F4238BC8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F4238BC8:
dmi.product.name: MacBookPro3,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901-1ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20111219.aacbd629-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20111201+b5534a1-1build2

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


** Tags: amd64 apport-bug precise single-occurrence ubuntu

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Title:
  Unity crashed during upgrade from 11.10 to 12.04

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