[Bug 24061] Re: GPG error with apt-get/aptitude/update-manager behind proxy (BADSIG 40976EAF437D05B5)

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Just ran into this problem on 13.10. If a fix was released 12 months ago
why is it still happening?

My situation seems similar to all the rest, rather than a 404 my
satellite ISP returns nonstandard error messages about link outage if it
does not return results in time and apt-get got permanently screwed up
from it.

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https://bugs.launchpad.net/bugs/24061

Title:
  GPG error with apt-get/aptitude/update-manager behind proxy (BADSIG
  40976EAF437D05B5)

Status in “apt” package in Ubuntu:
  Fix Released
Status in “update-manager” package in Ubuntu:
  Won't Fix
Status in “apt” source package in Precise:
  Fix Released
Status in “update-manager” source package in Precise:
  Won't Fix
Status in “apt” source package in Quantal:
  Fix Released
Status in “update-manager” source package in Quantal:
  Won't Fix

Bug description:
  I keep getting this when i launch the update manager.

  W: GPG error: http://archive.ubuntu.com breezy-updates Release: The following
  signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic
  Signing Key <ftpmaster at ubuntu.com>

  How can I fix it?

  ***********
  WORKAROUND:
  ----------
  Run the following commands(saves a backup of the old lists and creates a new lists folder) and the BADSIG error does not occur :

  $ cd /var/lib/apt
  $ sudo mv lists lists.old
  $ sudo mkdir -p lists/partial
  $ sudo apt-get update

  ***********

  comment from Rolf Leggewie: This is due to cache inconsistencies and
  thus is not necessarily a bug in Ubuntu at all.  But I hope the fine
  devs can find a way to better deal with broken proxies.  This is a
  very visible issue, a large number of internet connections are behind
  proxies and the users cannot do anything about it.

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