[Bug 875103] Re: Update from Ubuntu 11.04 to 11.10 does not work

[Markus Huber]

I might have found a solution to this.
Using

sudo apt-get dist-upgrade

I got more useful information, namely the names of the packages causing
the error:

Die folgenden Pakete haben unerfüllte Abhängigkeiten:
 libgtk2-ruby1.8 : Hängt ab von: libatk1-ruby1.8 (= 0.19.3-2ubuntu1)
                   Hängt ab von: libpango1-ruby1.8 (= 0.19.3-2ubuntu1)
                   Hängt ab von: libgdk-pixbuf2-ruby1.8 (= 0.19.3-2ubuntu1)
E: Fehler: Unterbrechungen durch pkgProblemResolver::Resolve hervorgerufen; dies könnte durch zurückgehaltene Pakete verursacht worden sein.

I uninstalled these three packages (and those depending on them) in
Synaptic. The dist-upgrade continues then without the error mentioned in
the bug report. I do not know why I did not get this information from
the Upgrade process using the GUI.

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https://bugs.launchpad.net/bugs/875103

Title:
  Update from Ubuntu 11.04 to 11.10 does not work

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  Trying to update Ubuntu 11.04 to 11.10. After downloading the new
  sources the following error pops up:

  Es konnte nicht ermittelt werden, welche Systemaktualisierungen
  verfügbar sind

  An unresolvable problem occurred while calculating the upgrade:
  E:Fehler: Unterbrechungen durch pkgProblemResolver::Resolve hervorgerufen; dies könnte durch zurückgehaltene Pakete verursacht worden sein.

   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.

  Have already deactivated all sources manually, no change. Since I
  never had any pre-release installed and do not have any apparent
  package issues, I think this may be a bug.

  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 x86_64
  NonfreeKernelModules: fglrx
  Architecture: amd64
  Date: Sat Oct 15 17:34:52 2011
  GConfNonDefault:
   /apps/update-manager/check_new_release_ignore=natty
   /apps/update-manager/first_run=false
   /apps/update-manager/show_details=true
   /apps/update-manager/window_size=(600,600)
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=de_DE:en
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to natty on 2011-10-15 (0 days ago)

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