[Bug 1593776] Re: cannot upgrade from 15.10 to 16.04

[Brian Murray]

You seem to have a lot of packages on hold which is causing the release
upgrader to fail to calculate the upgrade.  The files on hold can be
seen in your VarLogDistupgradeAptlog file.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1593776

Title:
  cannot upgrade from 15.10 to 16.04

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

Bug description:
  sudo update-manager -d

  says

  Could not determine 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 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.14.4
  ProcVersionSignature: Ubuntu 4.2.0-38.45-generic 4.2.8-ckt10
  Uname: Linux 4.2.0-38-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Jun 17 16:21:27 2016
  InstallationDate: Installed on 2014-03-09 (830 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to wily on 2016-06-17 (0 days ago)
  VarLogDistupgradeTermlog:

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