[Bug 1573554] Re: I can not change version

[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/1573554

Title:
  I can not change version

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

Bug description:
  could not calculate the update

  a problem while the update is calculated has occurred.

  That has been caused by :
  * Upgrade to a version of Ubuntu yet published
  * Be running the current version , not yet published , Ubuntu
  * Unofficial software packages not provided by Ubuntu

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

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.16.0-67.87~14.04.1-generic 3.16.7-ckt24
  Uname: Linux 3.16.0-67-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Fri Apr 22 07:03:33 2016
  InstallationDate: Installed on 2015-07-29 (268 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 2016-04-22 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-04-21T19:22:04.404490

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