[Bug 897788] Re: Using Ubuntu repository mirror receive message: "The action would require the installation of packages from not authenticated sources" when trying to install or upgrade packages.

[Semen Cirit]

** Changed in: update-manager (Ubuntu)
       Status: New => Incomplete

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Title:
  Using Ubuntu repository mirror receive message: "The action would
  require the installation of packages from not authenticated sources"
  when trying to install or upgrade packages.

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

Bug description:
  Intermittently when running Update Manager or Ubuntu Software or
  Synaptic and upgrading or installing new packages the message: "The
  action would require the installation of packages from not
  authenticated sources" is returned and the package cannot be
  installed.

  - This occurs intermittently, without any changes to the "Software Sources". 
  - All Software Source have GPG keys installed.
  - This only occurs when "Main Server" is not selected for "Ubuntu Software"
  - Most of the time "Server for South Africa" is selected.
  - Have also encountered this issue with "Server for New Zealand"

  The issue is intermittent. I believe it has something to do with the
  "package lists" on the mirrors servers.

  The method I have used to resolve the issue is set the Source for
  Ubuntu Software in the Software Sources to  "Main Server". Then the
  attempts to install a package or install updates to existing packages
  then works.

  I do not know what log files to provide to assist in the determination
  of the under the covers cause, please guide me.

  Regards,
  Marc 

  Other Information:

  Issue primarily occurs in update-manager. But also affected is "Ubuntu
  Software Center" and Synaptic.

  LSB: Description:       Ubuntu 11.10 Release:   11.10

  APT Policy:
  update-manager:
    Installed: 1:0.152.25.5
    Candidate: 1:0.152.25.5
    Version table:
   *** 1:0.152.25.5 0
          500 http://za.archive.ubuntu.com/ubuntu/ oneiric-updates/main amd64 Packages
          500 http://za.archive.ubuntu.com/ubuntu/ oneiric-security/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.152.25 0
          500 http://za.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

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