[Bug 1017114] Re: Update Manager will not run

[Marius Margowski]

*** This bug is a duplicate of bug 346386 ***
    https://bugs.launchpad.net/bugs/346386

** Package changed: ubuntu => update-manager (Ubuntu)

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https://bugs.launchpad.net/bugs/1017114

Title:
  Update Manager will not run

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

Bug description:
  I have been using Ubuntu 12.04 since the day of its release and it's
  never missed a beat.  I'm new to Ubuntu and unclear on how best to
  report this bug (if it is a bug).  The error messages attached have
  indicated that it is a bug and that I should report it, so I am
  endeavouring to do so.

  I think the problem was caused by my attempting to install Chromium
  Browser using the Ubuntu Software Centre package.  The installation
  started as normal and then stopped with an error message that I had
  never seen before.  In the upper toolbar (alongside the email icon)
  there is now a red circle with a white horizontal bar in the centre -
  when I click on that new icon, the following message appears:

  "An error occurred, please run Package Manager from the right-click
  menu or apt-get in a terminal to see what is wrong.  The error message
  was "Error: Opening the cache (E: Encountered a section with no
  Package: header, E: Problem with MergeList /var/lib/apt/lists/
  gb.archive, ubuntu.com_ubuntu_dists_precise_backports_universe_binary-
  i386_Packages, E: The package lists or status file could not be parsed
  or opened)'  This usually means that your installed packages have
  unmet dependencies."

  I am not able to run synaptic (this program shuts itself down without
  error message) and I am unclear on exactly what option to use with
  apt-get.

  I have spent a while reading up on bugs and how to report them but
  haven't been able to use the other means described - "no bug
  detected".

  I used the command "apt-cache policy pkgname" and received a message
  with the same compnents of the message quoted above.

  I then took two screenshots of error messages I received as I was
  attempting to burrow into the problem and I will try to attach them
  here.   It seems that I  can attach only one of these messages, and
  have done so.

  I can no longer use synaptic or the apt-get package manager - this
  error kills them both, so future updates appear to be impossible.

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