[Bug 1575440] Re: Ubuntu 14.04 upgrade to 16.04

[Brian Murray]

*** This bug is a duplicate of bug 996916 ***
    https://bugs.launchpad.net/bugs/996916

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 996916, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** This bug has been marked a duplicate of bug 996916
   postgresql packages in the removal blacklist making it hard to upgrade

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1575440

Title:
  Ubuntu 14.04 upgrade to 16.04

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

Bug description:
  I run:

  sudo apt-get update

  sudo apt-get dist-upgrade

  sudo apt-get install update-manager-core

  sudo do-release-upgrade -d

  throws error:

  'calculating measure changes

  Could not calculate the upgrade

  An unsolvable problem occurred while calculating the upgrade.

  Possible causes are:
  * An update to a version pre-release of Ubuntu;
  * Run from a pre-release version of Ubuntu;
  * Use of unofficial packages not provided by Ubuntu; '

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-86.130-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-86-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.20
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Apr 26 21:43:01 2016
  InstallationDate: Installed on 2015-04-13 (379 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-04-27 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1575440/+subscriptions