Failure upgrading from 10.04 to 12.04

[Allen Servedio]

I am unable to determine which package needs to be removed. I am seeing the error below:

  Could not calculate 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 turned off all "Other Software" sites listed under "Software Sources". I ran the following with no change:

root@allen-laptop:~# apt-get autoclean
Reading package lists... Done
Building dependency tree
Reading state information... Done
root@allen-laptop:~# apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@allen-laptop:~# apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@allen-laptop:~# dpkg --configure -a
root@allen-laptop:~# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@allen-laptop:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@allen-laptop:~#

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: update-manager 1:0.134.12.1
ProcVersionSignature: Ubuntu 2.6.32-42.95-generic 2.6.32.59+drm33.24
Uname: Linux 2.6.32-42-generic i686
Architecture: i386
Date: Sun Aug 26 22:10:48 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/show_details=false
 /apps/update-manager/show_versions=false
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: update-manager
VarLogDistupgradeTermlog:

[Allen Servedio (a-allen-i)]

Found another website (http://askubuntu.com/questions/109210/could-not-calculate-the-upgrade-on-upgrade-from-11-04-to-11-10).

I ran the following and was finally able to get around the issue: apt-get remove libglib2-ruby1.8

You can close this defect.

[Edward Donovan (edward.donovan)]

Ok, thanks!

[Jean-Baptiste Lallement (jibel)]

reopening. Removing an official package to be able to upgrade doesn't make the report invalid.

[dino99 (9d9)]

This version is no more supported