[Bug 1651850] Re: upgrader fails to upgrade from14.04 to 16.04. Could not calculate the upgrade error msg.

[Ubuntu Foundations Team Bug Bot]

** Tags added: trusty2xenial

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https://bugs.launchpad.net/bugs/1651850

Title:
  upgrader fails to upgrade from14.04 to 16.04. Could not calculate the
  upgrade error msg.

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

Bug description:
  I get message:

  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.

  i am just trying to upgrade from 14.04 to 16.04.  My other laptop
  worked just fine, but tjis laptop using Lenovo P50s fails with the
  message above.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.9
  ProcVersionSignature: Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1
  Uname: Linux 4.2.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Wed Dec 21 12:53:42 2016
  InstallationDate: Installed on 2016-08-13 (130 days ago)
  InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-12-21 (0 days ago)
  VarLogDistupgradeTermlog:

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