[Bug 1385372] Re: Not able to upgrade from 14.04 to 14.10, stops with error message stating it could not calculate the upgrade ...

[Kevin Dalley]

This problem sounds familiar. I believe that I had it on a previous
upgrade.

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https://bugs.launchpad.net/bugs/1385372

Title:
  Not able to upgrade from 14.04 to 14.10, stops with error message
  stating it could not calculate the upgrade ...

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

Bug description:
  "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

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal."

  I do have one or two programs that are not from apt-get, but would be
  nice to know what software is causing the problem and what I should do
  to fix it.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.5
  Uname: Linux 3.13.6-031306-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Oct 24 11:02:24 2014
  InstallationDate: Installed on 2013-09-24 (394 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2014-10-24 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2014-04-23T22:41:16.573026

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