Public bug reported:

I run update-manager -d to upgrade from Ubuntu 10.04.4 LTS (as per
lsb_release) t0 12.04 LTS

During 'Setting new software channels'  (calculating the changes) I'm
told :


------
Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by 
held packages.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the command 
'ubuntu-bug update-manager' in a terminal.
------


I've removed every 3rd party repository from my sources (via software
sources).  I don't believe I'm running a pre-release version and I
certainly don't want to upgrade to one.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: update-manager 1:0.134.12.1
ProcVersionSignature: Ubuntu 2.6.32-41.89-generic 2.6.32.59+drm33.24
Uname: Linux 2.6.32-41-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue May 22 15:13:52 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/first_run=false
 /apps/update-manager/show_versions=false
 /apps/update-manager/window_size=(500,641)
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
PackageArchitecture: all
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: update-manager
VarLogDistupgradeTermlog:

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade lucid

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https://bugs.launchpad.net/bugs/1002929

Title:
  update-manager -d fails and request I send a bug report

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