[Bug 1611469] Re: do-release-upgrade from 14.04.5 to 16.04.1 fails

[Brian Murray]

*** This bug is a duplicate of bug 1610756 ***
    https://bugs.launchpad.net/bugs/1610756

** This bug has been marked a duplicate of bug 1610756
   upgrade to 16.04 failed

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https://bugs.launchpad.net/bugs/1611469

Title:
  do-release-upgrade from 14.04.5 to 16.04.1 fails

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

Bug description:
  Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-93-generic x86_64)

   * Documentation:  https://help.ubuntu.com/

    System information as of Tue Aug  9 19:04:33 BST 2016

    System load:  0.21               Processes:           109
    Usage of /:   19.9% of 14.38GB   Users logged in:     0
    Memory usage: 52%                IP address for eth0: 192.168.10.117
    Swap usage:   1%

    Graph this data and manage this system at:
      https://landscape.canonical.com/

  0 packages can be updated.
  0 updates are security updates.

  New release '16.04.1 LTS' available.
  Run 'do-release-upgrade' to upgrade to it.

  No mail.
  Last login: Tue Aug  9 19:04:35 2016 from lxc.home
  root at backuppc:~# do-release-upgrade

  ...

  Reading state information... Done
  Building data structures... Done

  Calculating the changes

  Calculating the changes

  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-93-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Aug  9 19:08:38 2016
  InstallationDate: Installed on 2014-07-05 (766 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-09 (0 days ago)

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