[Bug 1534914] Re: Cannot dist-upgrade from 14.04 to 15.04

[Brian Murray]

>From Mainlog.txt:

016-01-16 12:14:53,535 DEBUG plugins for condition 'from_trustyPostDistUpgradeCache' are '[]'
2016-01-16 12:14:53,536 DEBUG none of the '['ubuntu-desktop', 'kubuntu-desktop', 'xubuntu-core', 'xubuntu-desktop', 'ubuntustudio-desktop', 'mythbuntu-desktop', 'kubuntu-netbook', 'lubuntu-core', 'lubuntu-desktop', 'ubuntu-gnome-desktop']' meta-pkgs installed
2016-01-16 12:14:53,536 DEBUG guessing 'ubuntu-desktop' as missing meta-pkg
2016-01-16 12:14:55,338 ERROR failed to mark 'ubuntu-desktop' for install (E:Unable to correct problems, you have held broken packages.)

Please install one of the supported meta-pkgs listed and try the upgrade
again.

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

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https://bugs.launchpad.net/bugs/1534914

Title:
  Cannot dist-upgrade from 14.04 to 15.04

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

Bug description:
  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

  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
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Jan 16 12:15:25 2016
  InstallationDate: Installed on 2014-12-24 (387 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-16 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-16T11:44:46.201354

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