[Bug 1537984] [NEW] unable to upgrade to 15.04 from 14.04

[mRajdeep]

Public bug reported:

not able to upgrade from 14.04, upgrade always fails with "An
unresolvable problem occurred while calculating the upgrade"

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
Uname: Linux 3.13.0-74-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Jan 26 05:03:22 2016
InstallationDate: Installed on 2014-08-24 (519 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 2016-01-26 (0 days ago)
mtime.conffile..etc.update.manager.release.upgrades: 2016-01-26T04:37:09.560410

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


** Tags: amd64 apport-bug dist-upgrade trusty

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https://bugs.launchpad.net/bugs/1537984

Title:
  unable to upgrade to 15.04 from 14.04

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

Bug description:
  not able to upgrade from 14.04, upgrade always fails with "An
  unresolvable problem occurred while calculating the upgrade"

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
  Uname: Linux 3.13.0-74-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Jan 26 05:03:22 2016
  InstallationDate: Installed on 2014-08-24 (519 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 2016-01-26 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-26T04:37:09.560410

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