[Bug 873883] Re: Natty->Oneiric Upgrade failed: An unresolvable problem occurred while calculating the upgrade

[Michael Vogt]

This is what breaks the upgrade:

Investigating (0) libgtk2.0-0 [ i386 ] < none -> 2.24.6-0ubuntu5 > ( libs )
Broken libgtk2.0-0:i386 Depends on libcups2 [ i386 ] < none -> 1.5.0-8 > ( libs ) (>= 1.4.0)
  Considering libcups2:i386 4 as a solution to libgtk2.0-0:i386 5
  Holding Back libgtk2.0-0:i386 rather than change libcups2:i386


That is because of:
2011-10-14 08:59:10,207 DEBUG Obsolete: ... libcupsys2 ...

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https://bugs.launchpad.net/bugs/873883

Title:
  Natty->Oneiric Upgrade failed: An unresolvable problem occurred while
  calculating the upgrade

Status in “ia32-libs” package in Ubuntu:
  Invalid
Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  I got the following error message pop-up:

  ----------
  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.
  ----------

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: update-manager 1:0.150.3
  ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
  Uname: Linux 2.6.38-12-generic x86_64
  Architecture: amd64
  Date: Fri Oct 14 08:45:07 2011
  GConfNonDefault:
   /apps/update-manager/check_new_release_ignore=
   /apps/update-manager/first_run=false
   /apps/update-manager/show_details=true
   /apps/update-manager/window_size=(500,600)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to natty on 2011-10-14 (0 days ago)

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