[Bug 1164988] Re: upgrade from 10.04 to 12.04 not possible

[Brian Murray]

Thank you for taking the time to report this issue and helping to make
Ubuntu better. Examining the information you have given us, this does
not appear to be a bug report so we are closing it and converting it to
a question in the support tracker. We appreciate the difficulties you
are facing, but it would make more sense to raise problems you are
having in the support tracker at https://answers.launchpad.net/ubuntu if
you are uncertain if they are bugs. For help on reporting bugs, see
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** Changed in: update-manager (Ubuntu)
       Status: New => Invalid

** Converted to question:
   https://answers.launchpad.net/ubuntu/+source/update-manager/+question/226229

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https://bugs.launchpad.net/bugs/1164988

Title:
  upgrade from 10.04 to 12.04 not possible

Status in “update-manager” package in Ubuntu:
  Invalid

Bug description:
  The system I try to upgrade is a biolinux6 system which is based on ubuntu 10.04 and where a script is provided to make a two-step upgrade to biolinux7 on ubuntu 12.04. I had several trials for testing the upgrade via the script on virtual machines without any problem. 
  Normally the script first upgrades the system to the new ubuntu version and in the second step it installs the new packages for biolinux7.
  What`s happened was, that after running the script first there was an update of the packages for 10.04, after this the first restart
  follows. Then I run the script again and it made a test to the python-version after this result it starts the update-manager to start the upgrade. Normally this works without any problems and the system should have to be restarted again and running the script one time more.  But here it stops with two times the waring

  Failed to read the mirror file

  from the update-manager an information appears that some third-party sources are set inactive which could be activated later.
  Than it looks as if the new sources are installed. But instead of finishing this and go on downloading the updated files the information appears that an update was not possible because of the reason that there broken packages are held. But this is the point I am not familiar with and don't now how to go on solving this problem by myself.
  Package-Version:

  update-manager:
    Installiert: 1:0.134.12.1
    Kandidat: 1:0.134.12.1

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: update-manager 1:0.134.12.1
  ProcVersionSignature: Ubuntu 2.6.38-10.46~lucid1-generic 2.6.38.7
  Uname: Linux 2.6.38-10-generic x86_64
  Architecture: amd64
  Date: Fri Apr  5 14:29:25 2013
  GConfNonDefault:
   /apps/update-manager/check_new_release_ignore=
   /apps/update-manager/first_run=false
   /apps/update-manager/show_versions=false
   /apps/update-manager/window_size=(749,761)
  InstallationMedia: Bio-Linux 6 based on Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=de_DE:en
   PATH=(custom, no user)
   LANG=de_DE.utf8
   SHELL=/bin/zsh
  SourcePackage: update-manager
  VarLogDistupgradeAptclonesystemstate.tar.gz: Error: [Errno 13] Keine Berechtigung: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
  VarLogDistupgradeTermlog:

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