[Bug 1309477] Re: Cannot upgrade to 14.04 from 13.10

[Jean-Baptiste Lallement]

Reviewing the files from your upgrade attempt you seem to have enabled
the  oibaf ppa. This will prevent the upgrade as that PPA contains
different versions of packages essential to Ubuntu. Please revert to the
official Xorg packages and try the upgrade again.

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

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https://bugs.launchpad.net/bugs/1309477

Title:
  Cannot upgrade to 14.04 from 13.10

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

Bug description:
  In step 2 of 6 ("Setting new software sources") after fetching files I
  get a

  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.

  Any ideas?

  Thanks in advance,
  John

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: ubuntu-release-upgrader-core 1:0.205.5
  ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
  Uname: Linux 3.11.0-19-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri Apr 18 13:03:25 2014
  InstallationDate: Installed on 2013-12-29 (109 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to saucy on 2014-04-18 (0 days ago)
  VarLogDistupgradeTermlog:

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