[Bug 1404476] Re: error during upgrade from 12.04 to 14.04

[Brian Murray]

This is due to the blender PPA you have enabled which uses a version of
python greater than the one in Trusty. You'll need to disable and remove
packages from that ppa using the tool ppa-purge. Thanks and good luck!

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https://bugs.launchpad.net/bugs/1404476

Title:
  error during upgrade from 12.04 to 14.04

Status in update-manager package in Ubuntu:
  Incomplete

Bug description:
  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 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.5.0-54.81~precise1-generic 3.5.7.33
  Uname: Linux 3.5.0-54-generic i686
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: i386
  Date: Sat Dec 20 12:35:30 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1419075196
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 "Precise" - Build i386 LIVE Binary 20130822-17:25
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-12-20 (0 days ago)
  VarLogDistupgradeTermlog:

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