[Bug 1573252] Re: upgrade to 16.04 could not calculate the upgrade error

[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: Confirmed => 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/1573252

Title:
  upgrade to 16.04 could not calculate the upgrade error

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

Bug description:
  When upgrading from 15.10 to 16.04 went ok until we got the could not
  calculate the upgrade error message.

  I read if there are unofficial software packages it could be the
  problem. How would I know what packages are unofficial and how exactly
  would I remove them?

  Long time Ubuntu user over 7 years if that helps.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.14.4
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic i686
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: i386
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Apr 21 17:02:46 2016
  InstallationDate: Installed on 2016-02-25 (55 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to wily on 2016-04-21 (0 days ago)
  VarLogDistupgradeTermlog:

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