[Bug 1625103] Re: Unable to update ubuntu from 14.04 to 16.04, "No se ha podido calcular la actualización"

[Brian Murray]

The postgres repository you have enabled is causing a failure to
calculate the upgrade.  You'll need to install the ppa-purge tool and
use it remove that repository and downgrade the packages to the official
Ubuntu versions for the upgrade to be calculated correctly.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1625103

Title:
  Unable to update ubuntu from 14.04 to 16.04, "No se ha podido calcular
  la actualización"

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

Bug description:
  Error message while updating ubuntu:

  No se ha podido calcular la actualización

  Ha ocurrido un problema mientras se calculaba la actualización.

   Eso se ha podido causar por:
   * Actualizar a una versión de Ubuntu aún no publicada
   * Estar ejecutando la versión actual, aún no publicada, de Ubuntu
   * Paquetes no oficiales de software no proporcionados por Ubuntu

  Si nada de esto aplica, informe de este error usando la orden «ubuntu-
  bug ubuntu-release-upgrader-core» en una terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-95.142-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-95-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon Sep 19 11:53:50 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-12-14 (644 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 2016-09-19 (0 days ago)
  VarLogDistupgradeTermlog:

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