[Bug 1008616] Re: update-manager fails

[Roland Fritz]

** Attachment added: "picture of error message pre-resolution"
   https://bugs.launchpad.net/bugs/1008616/+attachment/3175130/+files/Screenshot%20from%202012-06-04%2012%3A11%3A34.png

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https://bugs.launchpad.net/bugs/1008616

Title:
  update-manager fails

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

Bug description:
  error message when running update-manager:
  ========================================
  Could not initialize the package information

  An unresolvable problem occurred while initializing the package
  information.

  Please report this bug against the 'update-manager' package and
  include the following error message:

  'E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/ppa.launchpad.net_tualatrix_ppa_ubuntu_dists_precise_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.'
  ========================================

  After running sudo apt-get update from terminal I see:

  Reading package lists... Error!
  W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster at ubuntu.com>

  W: GPG error: http://archive.canonical.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster at ubuntu.com>
  W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 6A9653F936FD5529 Launchpad PPA for atareao
  W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 44270923C32A36BF Launchpad PPA
  W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 6AF0E1940624A220 Launchpad PPA for TualatriX
  W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release  

  W: Some index files failed to download. They have been ignored, or old ones used instead.
  E: Encountered a section with no Package: header
  E: Problem with MergeList /var/lib/apt/lists/ppa.launchpad.net_tualatrix_ppa_ubuntu_dists_precise_main_binary-i386_Packages
  E: The package lists or status file could not be parsed or opened.

  ========================================

  This seemed like the keys need to be refreshed and so I tried purging
  my cache.

  sudo apt-get clean followed by a new update returns the same error.
  sudo apt-key update revealed keys were up to date.

  Searched the help forum and found a recent issue with similar problem: http://ubuntuforums.org/showthread.php?t=1983220
  Followed steps provided by 2F4U and resolved issue:
  cd /var/lib/apt
  sudo mv lists lists.old
  sudo mkdir -p lists/partial
  sudo apt-get update

  Thought I would still report the bug.

  Running Ubuntu 12.04 Precise Pangolian, update-manager 1:0.156.14.4,
  apport failed to gather package information.

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