[Bug 1453716] Re: Release upgrade from 14.04 to 14.10 fails

[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/1453716

Title:
  Release upgrade from 14.04 to 14.10 fails

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

Bug description:
  System upgrade from 14.04 to 14.10 on a Ubuntu desktop 14.04.1 LTS on
  a Dell Optiplex 760 with intel Core2 Quad Q8300 CPU and an intel 4
  series integrated graphics controller (`uname -a` :`Linux systemname
  3.13.0-53-generic #87-Ubuntu SMP Thu May 7 14:32:24 UTC 2015 x86_64
  x86_64 x86_64 GNU/Linux`) on which I have some problems loading the
  desktop interface: http://askubuntu.com/questions/548376/ubuntu-14-04
  -desktop-environment-does-not-load .  I was hoping a release upgrade
  may resolve issues.

  The initial process of do-release upgrade works well but after the
  "calculating changes" step I get the following output:

  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 

  It is quite weird "calculating the changes" shows twice. I am
  upgrading from an LTS version so I don't think I am running a current
  pre-release version. I am upgrading to 14.10 while 15.04 is already
  out so I don't think I am upgrading to a pre-release version. I am
  unaware of unofficial software packages prohibiting upgrade nor how to
  check if they do.

  lsb-release -rd outputs:
  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04

  apt-cache policy ubuntu-release-upgrader-core yields:
  ubuntu-release-upgrader-core:
    Installed: 1:0.220.7
    Candidate: 1:0.220.7
    Version table:
   *** 1:0.220.7 0
          500 http://be.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.220.2 0
          500 http://be.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.7
  ProcVersionSignature: Ubuntu 3.13.0-53.87-generic 3.13.11-ckt19
  Uname: Linux 3.13.0-53-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon May 11 10:49:07 2015
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   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 2015-05-11 (0 days ago)
  modified.conffile..etc.update.manager.release.upgrades: [modified]
  mtime.conffile..etc.update.manager.release.upgrades: 2015-05-11T10:17:53.087470

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