Comment 41 for bug 1069133

Thank you Steven. I was a bit more drastic. After purging the ppa didn't work I purged the whole graphic environment from the X-server on up. Then I did a CLI dist-upgrade and finally re-installed all the purged packages back. I had to re-install the Nvidia driver back and after that everything worked. The funny thing is that this happened only in one machine of eight with supposedly identical configuration.

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-------- Original message --------
From: Steven McCullagh <email address hidden>
Date:
To: <email address hidden>
Subject: [Bug 1069133] Re: Get upgrade error 12.04 - 12.10 "Could not
  determine upgrade" - xorg from ppa

If running ppa-purge xorg-edgers doesn't work, try the following:

sudo apt-get remove xserver-xorg-video-all

This will then allow you to upgrade from Ubuntu 13.10 to 14.04.

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duplicate bug report (1313080).
https://bugs.launchpad.net/bugs/1069133

Title:
  Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg
  from ppa

Status in “ubuntu-release-upgrader” package in Ubuntu:
  In Progress

Bug description:
  TEST CASE:
  1. Install a minimal Saucy amd64 (lxc container or VM)
  2. Install software-properties-common if it is not already installed and enable xorg-edgers PPA:
    $ sudo add-apt-repository ppa:xorg-edgers/ppa
  3. Install the task ubuntu-desktop
    $ sudo apt-get install ubuntu-desktop^
  4. Upgrade:
    $ sudo do-release-upgrade -d

  ACTUAL RESULT:
  Upgrade fails because it refuses to break the ABI of xorg.

  == Original Description ==
  Gets to the upgrade stage Setting new Software channels and the error window comes up on the Calculating the Changes part. Have got all security updates for 12.04 on and restarted but it still comes up. Using the proper software channels.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubuntu-release-upgrader-core (not installed)
  ProcVersionSignature: Ubuntu 3.5.0-17.26-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu14
  Architecture: amd64
  Date: Sat Oct 20 17:16:19 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to precise on 2012-10-20 (0 days ago)

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