[Bug 1610020] [NEW] Upgrade to 16.04 fails "Couldn't calculate upgrade"

[Pär Olsson]

Public bug reported:

Reproducible bug. Happens everytime I try to upgrade to 16.04.

lsb_release -rd
Description:	Ubuntu 14.04.4 LTS
Release:	14.04

Error 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.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-92.139-generic 3.13.11-ckt39
Uname: Linux 3.13.0-92-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Fri Aug  5 01:51:22 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
InstallationDate: Installed on 2014-11-07 (636 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-04 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty

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https://bugs.launchpad.net/bugs/1610020

Title:
  Upgrade to 16.04 fails "Couldn't calculate upgrade"

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

Bug description:
  Reproducible bug. Happens everytime I try to upgrade to 16.04.

  lsb_release -rd
  Description:	Ubuntu 14.04.4 LTS
  Release:	14.04

  Error 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.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-92.139-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-92-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Aug  5 01:51:22 2016
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20130203-1
  InstallationDate: Installed on 2014-11-07 (636 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-04 (0 days ago)
  VarLogDistupgradeTermlog:

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