[Bug 1365217] Re: Cannot upgrade to Ubuntu Release 14.04.1 LTS

[robin]

*** This bug is a duplicate of bug 1362725 ***
    https://bugs.launchpad.net/bugs/1362725

** This bug has been marked a duplicate of bug 1362807
   Tried to upgrade, told It could not happen

** This bug is no longer a duplicate of bug 1362807
   Tried to upgrade, told It could not happen
** This bug has been marked a duplicate of bug 1364927
   Cannot upgrade from 12.04 to 14.04

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https://bugs.launchpad.net/bugs/1365217

Title:
  Cannot upgrade to Ubuntu Release 14.04.1 LTS

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

Bug description:
  Using Update Manager, an attempt to perform the upgrade entitled, "New Ubuntu release  '14.04.1 LTS' is available", fails with the error:
  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.

  Existing (pre-upgrade) version:
  Description:  Ubuntu 12.04.5 LTS
  Release:  12.04

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.2.0-68.102-generic-pae 3.2.62
  Uname: Linux 3.2.0-68-generic-pae i686
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: i386
  Date: Wed Sep  3 15:45:34 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1409794669
   com.ubuntu.update-manager window-height 599
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  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 2014-09-04 (0 days ago)
  VarLogDistupgradeTermlog:

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