ubiquity-dm crashed with MissingProgramError in run(): No window manager found (tried metacity, xfwm4, matchbox-window-manager, openbox-lubuntu, openbox)

[jerrylamos]

Quantal-desktop-amd64 from USB startup disk creator, .iso image dated 20 August 2012
Just started "install" when this error occurred. Acer Aspire 5253 wide screen notebook amd64x2

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.22
ProcVersionSignature: Ubuntu 3.5.0-10.10-generic 3.5.1
Uname: Linux 3.5.0-10-generic x86_64
ApportVersion: 2.4-0ubuntu8
Architecture: amd64
CasperVersion: 1.321
Date: Tue Aug 21 01:41:18 2012
ExecutablePath: /usr/bin/ubiquity-dm
ExecutableTimestamp: 1344418508
InstallCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash --
InterpreterPath: /usr/bin/python3.2mu
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120820)
ProcCmdline: /usr/bin/python3 /usr/bin/ubiquity-dm vt7 :0 ubuntu /usr/bin/ubiquity --only
ProcCwd: /
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/ubiquity-dm', 'vt7', ':0', 'ubuntu', '/usr/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity-dm crashed with MissingProgramError in run(): No window manager found (tried metacity, xfwm4, matchbox-window-manager, openbox-lubuntu, openbox)
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1037515, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.