[Bug 1609428] Re: An unsolvable problem occurred while calculating the upgrade

[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/1609428

Title:
  An unsolvable problem occurred while calculating the upgrade

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

Bug description:
  Translated from original to English using translate.google.com:

  Could not calculate the upgrade not a solvable problem occurred while
  calculating the upgrade.

  Possible causes are: 
   * An update to a version pre-release of Ubuntu; 
   * Run from a pre-release version of Ubuntu; 
   * Use of unofficial packages not provided by Ubuntu;

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.14.4
  ProcVersionSignature: Ubuntu 4.2.0-42.49-generic 4.2.8-ckt12
  Uname: Linux 4.2.0-42-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Aug  3 11:03:03 2016
  InstallationDate: Installed on 2016-07-07 (26 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to wily on 2016-08-03 (0 days ago)

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