[Bug 1298893] Re: can't upgrade from 13.04 to 13.10--says it can't calculate the amount of time it would take

[Brian Murray]

This is because you have a PPA version of cinnamon installed which is
greater than the one available in trusty, as the release upgrader
disables PPAs it is unable to calculate the upgrade.  You'll need to
downgrade to the 13.04 version of cinnamon for the upgrade to be
successfully calculated.

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

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https://bugs.launchpad.net/bugs/1298893

Title:
  can't upgrade from 13.04 to 13.10--says it can't calculate the amount
  of time it would take

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

Bug description:
  Stops during "Setting new software channels" and gives the following
  message

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-35.50-generic 3.8.13.13
  Uname: Linux 3.8.0-35-generic i686
  ApportVersion: 2.9.2-0ubuntu8.5
  Architecture: i386
  CrashDB: ubuntu
  Date: Fri Mar 28 06:00:10 2014
  InstallationDate: Installed on 2010-08-03 (1332 days ago)
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2014-03-28 (0 days ago)
  VarLogDistupgradeTermlog:

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