[Bug 1385657] Re: Upgrade to 14.10 fails - could not calculate the upgrade

[Brian Murray]

*** This bug is a duplicate of bug 1385545 ***
    https://bugs.launchpad.net/bugs/1385545

** This bug has been marked a duplicate of bug 1385545
   14.10 upgrade fails with the error : -" Could not calculate the upgrade"

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https://bugs.launchpad.net/bugs/1385657

Title:
  Upgrade to 14.10 fails - could not calculate the upgrade

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Confirmed

Bug description:
  Upgrade from 14.04 to 14.10 fails with the following message:

  Calculating the changes

  Could not calculate 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 

  --
  I've removed all unofficial packages but still get the same error.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.5
  ProcVersionSignature: Ubuntu 3.13.0-38.65-generic 3.13.11.8
  Uname: Linux 3.13.0-38-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Oct 25 23:54:26 2014
  InstallationDate: Installed on 2012-12-15 (679 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2014-10-25 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2014-10-24T10:55:19.046694

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