[Bug 1241863] Re: An unresolvable problem occurred while calculating the upgrade.

[Brian Murray]

Reviewing the files from your upgrade attempt you seem to have enabled
the xorg-edgers-ppa.  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.

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

** Tags added: ppa xorg-edgers-ppa

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https://bugs.launchpad.net/bugs/1241863

Title:
  An unresolvable problem occurred while calculating the upgrade.

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

Bug description:
  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 terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-32.47-generic 3.8.13.10
  Uname: Linux 3.8.0-32-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.4
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Oct 19 08:57:37 2013
  InstallationDate: Installed on 2013-07-23 (87 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)
  VarLogDistupgradeTermlog:

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