[Bug 1241614] Re: release upgrade failure due to unresolvable problem

[Jean-Baptiste Lallement]

*** This bug is a duplicate of bug 1241420 ***
    https://bugs.launchpad.net/bugs/1241420

** This bug has been marked a duplicate of bug 1241420
   unity held back if ubuntu-desktop is not installed during upgrade from raring to saucy (upgrade fails)

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https://bugs.launchpad.net/bugs/1241614

Title:
  release upgrade failure due to unresolvable problem

Status in “ubuntu-release-upgrader” package in Ubuntu:
  New

Bug description:
  do-release-upgrade to xubuntu 13.10 aborts with following error.

  -----------------------------------------------------------------------------------------

  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 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  Uname: Linux 3.8.0-31-generic i686
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: i386
  CrashDB: ubuntu
  Date: Fri Oct 18 16:52:09 2013
  InstallationDate: Installed on 2012-08-22 (421 days ago)
  InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)

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