[Bug 1615785] Re: cannot upgrade from 14.04 to 16.04

[Brad Midgley]

In case it helps anyone else, I found apt.log had lines with Broken that
were problematic packages that had to be removed before restarting the
upgrade.

Broken openjdk-6-jre:amd64 Depends on openjdk-6-jre-headless [ amd64 ] < 6b39-1.13.11-0ubuntu0.14.04.1 > ( java ) (= 6b39-1.13.11-0ubuntu0.14.04.1)
Broken openjdk-7-jre:amd64 Depends on openjdk-7-jre-headless [ amd64 ] < 7u111-2.6.7-0ubuntu0.14.04.3 > ( java ) (= 7u111-2.6.7-0ubuntu0.14.04.3)
Broken openjdk-6-jre-lib:amd64 Depends on openjdk-6-jre-headless [ amd64 ] < 6b39-1.13.11-0ubuntu0.14.04.1 > ( java ) (>= 6b27)
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken dpkg:amd64 Breaks on wordpress [ amd64 ] < 3.8.2+dfsg-1ubuntu0.1 -> 4.4.2+dfsg-1ubuntu1 > ( universe/web ) (< 4.1+dfsg-1~)
Broken wordpress:amd64 Depends on libapache2-mod-php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )
Broken wordpress:amd64 Depends on php [ amd64 ] < none -> 1:7.0+35ubuntu6 > ( php )

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

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https://bugs.launchpad.net/bugs/1615785

Title:
  cannot upgrade from 14.04 to 16.04

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

Bug description:
  Calculating the changes

  Calculating the changes

  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 

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-93-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Aug 22 12:58:24 2016
  InstallationDate: Installed on 2012-01-10 (1686 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-22 (0 days ago)

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