[Bug 1597980] Re: Could not upgrade from 14.04 LTS to 15.10

[Brian Murray]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides Xorg packages. This will prevent the upgrade as that
PPA contains different versions of packages essential to Ubuntu.  The
page, https://launchpad.net/~xorg-edgers/+archive/ppa, contains details
on to how to revert to the official Xorg packages for the xorg-edgers
PPA.  Instructions for reverting to official Xorg packages should be
similar for the PPA that you have enabled.

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

** Tags added: ppa xorg-edgers-ppa

** This bug has been marked a duplicate of bug 1069133
   Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg from ppa

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https://bugs.launchpad.net/bugs/1597980

Title:
  Could not upgrade from 14.04 LTS  to 15.10

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

Bug description:
  Steps to repeat:
  1. Launch Software Updater
  2. Software Updater reports software is up to date but offers 15.10
  3. Click Upgrade and authenticate
  4. Wily Werewolf Release Notes is displayed. Click Upgrade

  Expect:
  Upgrade to 15.10

  Observe:
  Process halts because "could not calculate the upgrade"

  Info:

  lsb_release -rd
  Description:	Ubuntu 14.04.4 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.16.0-76.98~14.04.1-generic 3.16.7-ckt27
  Uname: Linux 3.16.0-76-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Jun 30 19:47:34 2016
  InstallationDate: Installed on 2015-06-25 (371 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-07-01 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2016-06-30T19:36:58.457826

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