[Bug 1448864] Re: Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade.

[Brian Murray]

*** This bug is a duplicate of bug 1384946 ***
    https://bugs.launchpad.net/bugs/1384946

** This bug has been marked a duplicate of bug 1384946
   Trying to upgrade to utopic, cannot compute changes due to gnuplot

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https://bugs.launchpad.net/bugs/1448864

Title:
  Could not calculate the upgrade  An unresolvable problem occurred
  while calculating the upgrade.

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

Bug description:
  The problem is that do-release-upgrade does not give any information
  about what is wrong.

  I upgraded from 12.04 to 14.04.2 and then directly to 15.04. The last
  upgrade failed for unknown reason.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.7
  ProcVersionSignature: Ubuntu 3.2.0-56.86-generic 3.2.51
  Uname: Linux 3.2.0-56-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Apr 27 07:52:46 2015
  InstallationDate: Installed on 2013-01-31 (815 days ago)
  InstallationMedia: Ubuntu-Server 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.3)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2015-04-27 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2015-04-25T10:20:39.949285

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