[Bug 1398824] Re: Upgrade 14.04 to 14.10 failed with ‘Could not determine the upgrade’

[Brian Murray]

*** This bug is a duplicate of bug 996916 ***
    https://bugs.launchpad.net/bugs/996916

** This bug has been marked a duplicate of bug 996916
   postgresql packages in the removal blacklist making it hard to upgrade

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https://bugs.launchpad.net/bugs/1398824

Title:
  Upgrade 14.04 to 14.10 failed with ‘Could not determine the upgrade’

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Running Lubuntu 14.04, I tried to upgrade to 14.10 with:

    $ update-manager -d &

  I pressed the ‘Upgrade’ button, then got a window with the release
  information, which started:

    Welcome to the Ubuntu 'Utopic Unicorn' development release

    This release is still in development. Do not install it on
  production machines.

  That isn't right (it has now been released), but I proceeded anyway.

    Could not determine the upgrade

    An unresolvable problem occurred while calculating the upgrade.

    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 ubuntu-release-upgrader-core' in a terminal.

  None of the above apply, hence this report.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.5
  ProcVersionSignature: Ubuntu 3.13.0-41.70-generic 3.13.11.11
  Uname: Linux 3.13.0-41-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: LXDE
  Date: Wed Dec  3 13:16:58 2014
  InstallationDate: Installed on 2012-03-01 (1007 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2014-12-03 (0 days ago)
  VarLogDistupgradeTermlog:

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