[Bug 1429573] Re: release upgrade to 14.04 stops

[Brian Murray]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides Xorg packages. 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 for the xorg-edgers
PPA.  Instructions for reverting to official Xorg packages should be
similar for the PPA that you have enabled.

** Changed in: update-manager (Ubuntu)
       Status: New => Invalid

** Tags added: ppa xorg-edgers-ppa

** This bug has been marked a duplicate of bug 1069133
   Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg from ppa

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https://bugs.launchpad.net/bugs/1429573

Title:
  release upgrade to 14.04 stops

Status in update-manager package in Ubuntu:
  Invalid

Bug description:
  when upgrading from 12.04.5 to 14.04, ubuntu stops 
  first message:
  Your graphics hardware may not be fully supported in Ubuntu 14.04. 

  L'esecuzione dell'ambiente desktop «unity» non è completamente 
  supportata dal proprio hardware. Dopo l'aggiornamento ci si troverà 
  in un ambiente molto rallentato. Si consiglia di mantenere la 
  versione LTS per il momento. Per ulteriori informazioni consultare la 
  pagina https://wiki.ubuntu.com/X/Bugs/UpdateManagerWarningForUnity3D. 
  Continuare comunque con l'aggiornamento? 

  
  then
  Impossibile calcolare l'avanzamento 

  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 

  Se non vengono installati, segnalare il problema usando il comando 
  «ubuntu-bug ubuntu-release-upgrader-core» in un terminale.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.18
  ProcVersionSignature: Ubuntu 3.2.0-77.112-generic 3.2.66
  Uname: Linux 3.2.0-77-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: amd64
  Date: Sun Mar  8 13:54:20 2015
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  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 2015-03-08 (0 days ago)

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