[Bug 1563510] Re: Unable to upgrade from 14.04 to 16.04 “Cannot Calculate Upgrades”

[Launchpad Bug Tracker]

*** This bug is a duplicate of bug 1565362 ***
    https://bugs.launchpad.net/bugs/1565362

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1563510

Title:
  Unable to upgrade from 14.04 to 16.04 “Cannot Calculate Upgrades”

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

Bug description:
  When I try to upgrade from 14.04 to 16.04, I receive a message “Cannot
  Calculate Upgrades” and the upgrade cannot proceed, is automatically
  stopped. it writes exactly:

  ------------
  Nelze vypočítat přechod na vyšší verzi

  Během propočítávání povýšení systému došlo k neřešitelné chybě.

   To může být způsobeno:
   * Povyšováním na vývojovou verzi Ubuntu
   * Běžící vývojovou verzí Ubuntu
   * Neoficiálními softwarovými balíky neposkytovanými Ubuntu

  Pokud se nic z toho nezdaří, nahlaste prosím chybu pomocí příkazu 'ubuntu-bug ubuntu-release-upgrader-core'.
  ------------

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.16.0-67.87~14.04.1-generic 3.16.7-ckt24
  Uname: Linux 3.16.0-67-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Mar 29 20:51:42 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-05-04 (330 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-03-29 (0 days ago)
  VarLogDistupgradeTermlog:

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