[Bug 1540189] Re: Not able to update from 12.04 to 14.04

[Brian Murray]

*** This bug is a duplicate of bug 1308338 ***
    https://bugs.launchpad.net/bugs/1308338

** This bug has been marked a duplicate of bug 1308338
   Ubuntu 12.04 LTS -> 14.04 LTS upgrade fails if Flight Gear installed

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https://bugs.launchpad.net/bugs/1540189

Title:
  Not able to update from 12.04 to 14.04

Status in update-manager package in Ubuntu:
  New

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.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-50.76-generic 3.2.48
  Uname: Linux 3.2.0-50-generic i686
  ApportVersion: 2.0.1-0ubuntu17.14
  Architecture: i386
  Date: Sun Jan 31 20:42:11 2016
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1454290316
   com.ubuntu.update-manager show-details true
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2016-02-01 (0 days ago)
  VarLogDistupgradeTermlog:

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