Unable to install 11.10 upgrade from 11.04.

[David W. Walter]

After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore.
This indicates a serious error, please report this bug using the command 'ubuntu-bug update-manager' in a terminal and include the files in /var/log/dist-upgrade/ in the bug report.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.3
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
Date: Thu Oct 13 21:53:56 2011
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/first_run=false
 /apps/update-manager/window_size=(600,600)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2011-10-14 (0 days ago)

[David W. Walter (dwalter42)]

Contents of main.log:
2011-10-13 21:06:06,597 INFO Using config files '['./DistUpgrade.cfg']'
2011-10-13 21:06:06,597 INFO uname information: 'Linux Kill-Box 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:18:14 UTC 2011 i686'
2011-10-13 21:06:06,597 INFO release-upgrader version '0.152.25' started
2011-10-13 21:06:06,776 DEBUG WARNING: can not get name for '<gtk.TreeSelection object at 0x9c76c84 (GtkTreeSelection at 0x9d71640)>'
2011-10-13 21:06:06,776 DEBUG WARNING: can not get name for '<gtk.TreeSelection object at 0x9c76cac (GtkTreeSelection at 0x9db4140)>'
2011-10-13 21:06:06,798 DEBUG svg pixbuf loader failed (Error displaying image)
2011-10-13 21:06:07,066 DEBUG Using 'DistUpgradeViewGtk' view
2011-10-13 21:06:07,123 DEBUG aufsOptionsAndEnvironmentSetup()
2011-10-13 21:06:07,123 DEBUG using '/tmp/upgrade-rw-6FJH2M' as aufs_rw_dir
2011-10-13 21:06:07,124 DEBUG using '/tmp/upgrade-chroot-CgqLIW' as aufs chroot dir
2011-10-13 21:06:07,124 DEBUG enable dpkg --force-overwrite
2011-10-13 21:06:07,146 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2011-10-13 21:06:08,985 DEBUG lsb-release: 'natty'
2011-10-13 21:06:08,986 DEBUG _pythonSymlinkCheck run
2011-10-13 21:06:08,987 DEBUG openCache()
2011-10-13 21:06:08,987 DEBUG Plugin modules in ./plugins: remove_lilo_plugin.py deb_plugin.py langpack_manual_plugin.py dpkg_status_plugin.py kdelibs4to5_plugin.py
2011-10-13 21:06:08,987 DEBUG Loading module ./plugins/remove_lilo_plugin.py
2011-10-13 21:06:08,988 DEBUG Plugins in <module 'remove_lilo_plugin' from './plugins/remove_lilo_plugin.py'>: <class 'remove_lilo_plugin.RemoveLiloPlugin'>
2011-10-13 21:06:08,989 DEBUG Loading module ./plugins/deb_plugin.py
2011-10-13 21:06:08,989 DEBUG Plugins in <module 'deb_plugin' from './plugins/deb_plugin.py'>: <class 'deb_plugin.DebPlugin'>
2011-10-13 21:06:08,989 DEBUG Loading module ./plugins/langpack_manual_plugin.py
2011-10-13 21:06:08,991 DEBUG Plugins in <module 'langpack_manual_plugin' from './plugins/langpack_manual_plugin.py'>: <class 'langpack_manual_plugin.MarkLangpacksManuallyInstalledPlugin'>
2011-10-13 21:06:08,991 DEBUG Loading module ./plugins/dpkg_status_plugin.py
2011-10-13 21:06:08,992 DEBUG Plugins in <module 'dpkg_status_plugin' from './plugins/dpkg_status_plugin.py'>: <class 'dpkg_status_plugin.DpkgStatusPlugin'>
2011-10-13 21:06:08,993 DEBUG Loading module ./plugins/kdelibs4to5_plugin.py
2011-10-13 21:06:08,994 DEBUG Plugins in <module 'kdelibs4to5_plugin' from './plugins/kdelibs4to5_plugin.py'>: <class 'kdelibs4to5_plugin.Kdelibs4devToKdelibs5devPlugin'>
2011-10-13 21:06:08,994 DEBUG plugins for condition 'PreCacheOpen' are '[]'
2011-10-13 21:06:08,994 DEBUG plugins for condition 'oneiricPreCacheOpen' are '[]'
2011-10-13 21:06:08,994 DEBUG plugins for condition 'from_nattyPreCacheOpen' are '[]'
2011-10-13 21:06:08,994 DEBUG quirks: running PreCacheOpen
2011-10-13 21:06:08,994 DEBUG running Quirks.PreCacheOpen
2011-10-13 21:06:08,994 DEBUG quirks: running oneiricPreCacheOpen
2011-10-13 21:06:08,994 DEBUG running Quirks.oneiricPreCacheOpen
2011-10-13 21:06:09,477 DEBUG /openCache(), new cache size 33639
2011-10-13 21:06:09,477 DEBUG needServerMode(): run i...

[Walter Garcia-Fontes (walter-garcia)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 873468 , so it 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. Feel free to continue to report any other bugs you may find.