[Bug 1518008] Re: 15.10 upgrade fails on 15.04

[Ubuntu Foundations Team Bug Bot]

*** 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
the xorg-edgers-ppa.  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.  Thanks.

[This is an automated message.  I apologize if it reached you
inappropriately; please just reply to this message indicating so.]

** Tags added: ppa

** Tags added: xorg-edgers-ppa

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

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https://bugs.launchpad.net/bugs/1518008

Title:
  15.10 upgrade fails on 15.04

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

Bug description:
  Fetched 0 B in 0s (0 B/s)

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

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubuntu-release-upgrader-core 1:15.04.14.3
  ProcVersionSignature: Ubuntu 3.19.0-33.38-generic 3.19.8-ckt7
  Uname: Linux 3.19.0-33-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.8
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Thu Nov 19 12:55:40 2015
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to vivid on 2015-11-19 (0 days ago)

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