[Bug 1450612] Re: uprade to ubuntu 15.04 from 14.10 failed

[Ubuntu Foundations Team Bug Bot]

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

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1069133, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug.  Additionally, any further discussion regarding the bug should occur in the other report.  Please continue to report any other bugs you may find.
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** 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/1450612

Title:
  uprade to ubuntu 15.04 from 14.10 failed

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

Bug description:
  Kon de opwaardering niet berekenen

  Er is een onoplosbaar probleem geconstateerd bij het berekenen van de
  opwaardering.

   Dit kan veroorzaakt worden door:
   * Opwaarderen naar een voorlopige versie van Ubuntu
   * Uitvoering van de huidige voorlopige versie van Ubuntu
   * Onofficiële softwarepakketten die niet door Ubuntu geleverd zijn.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubuntu-release-upgrader-core 1:14.10.10
  ProcVersionSignature: Ubuntu 3.16.0-36.48-generic 3.16.7-ckt9
  Uname: Linux 3.16.0-36-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Apr 30 21:50:55 2015
  InstallationDate: Installed on 2014-04-22 (373 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to utopic on 2015-04-30 (0 days ago)
  VarLogDistupgradeTermlog:

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