[Bug 1600635] [NEW] PXE Install 12.04 LTS Broken: The following packages cannot be authenticated: linux-headers-3.2.0-23

[Viniciusferrao]

Public bug reported:

When trying to install Ubuntu 12.04 LTS "Precise Pangolin" in a PXE
Environment with local repositories it fails complaining about the
following non authenticated packages: linux-headers-3.2.0-23 linux-
headers-3.2.0-23-generic linux-headers-generic.

The problem happens during the "Installing the base system" phase after
a long time getting the list of available packages.

Since this happens during the installation the procedure cannot continue
and we're unable to install the system.

Screenshots of the issue can be found attached on this report.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: linux-headers netinstall packages precise pxe ubuntu

** Attachment added: "pxe1204-err.png"
   https://bugs.launchpad.net/bugs/1600635/+attachment/4698502/+files/pxe1204-err.png

** Package changed: synaptic (Ubuntu) => debian-installer (Ubuntu)

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https://bugs.launchpad.net/bugs/1600635

Title:
  PXE Install 12.04 LTS Broken: The following packages cannot be
  authenticated: linux-headers-3.2.0-23

Status in debian-installer package in Ubuntu:
  New

Bug description:
  When trying to install Ubuntu 12.04 LTS "Precise Pangolin" in a PXE
  Environment with local repositories it fails complaining about the
  following non authenticated packages: linux-headers-3.2.0-23 linux-
  headers-3.2.0-23-generic linux-headers-generic.

  The problem happens during the "Installing the base system" phase
  after a long time getting the list of available packages.

  Since this happens during the installation the procedure cannot
  continue and we're unable to install the system.

  Screenshots of the issue can be found attached on this report.

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