I tried to upgrade to UbProblem downgrading from 11.10 to 11.04 via disk. "ubiquity-dm crashed with ValueError in command(): invalid literal for int() with base 10: ''

[Ben Corner]

I tried to upgrade to Ubuntu 11.10, but I think there were some ethernet driver problems for me. Inserted 11.04 disk, booted from it, and selected the option to "Upgrade from 11.10 to 11.04" when the menu popped up. Installation seemed to be going along fine, but then an error popped up halfway through saying that the installer had crashed.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: ubiquity 2.6.10 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Mon Oct 17 23:59:36 2011
ExecutablePath: /usr/bin/ubiquity-dm
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: /usr/bin/python /usr/bin/ubiquity-dm vt7 :0 hostname /usr/bin/ubiquity --greeter --only
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/ubiquity-dm', 'vt7', ':0', 'hostname', '/usr/bin/ubiquity', '--greeter', '--only']
SourcePackage: ubiquity
Title: ubiquity-dm crashed with ValueError in command(): invalid literal for int() with base 10: ''
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 Ubuntu better. This particular crash has already been reported and is a duplicate of bug #652916, 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.