[Bug 1630670] [NEW] Distribution upgrade fails from 14.04 to 16.04.1 at "calculating the changes" - Dialog says "Could not calculate the upgrade"

[Kurtis Saiyo]

Public bug reported:

Distribution upgrade fails from 14.04 to 16.04.1 at "calculating the
changes" - Dialog says "Could not calculate the upgrade"

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-96.143-generic 3.13.11-ckt39
Uname: Linux 3.13.0-96-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Wed Oct  5 09:33:34 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-04-25 (893 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-10-05 (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/1630670

Title:
  Distribution upgrade fails from 14.04 to 16.04.1 at "calculating the
  changes" - Dialog says "Could not calculate the upgrade"

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

Bug description:
  Distribution upgrade fails from 14.04 to 16.04.1 at "calculating the
  changes" - Dialog says "Could not calculate the upgrade"

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-96.143-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-96-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Oct  5 09:33:34 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-04-25 (893 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-10-05 (0 days ago)
  VarLogDistupgradeTermlog:

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