[Bug 1160346] Re: do-release-upgrade from Ubuntu 12.04 on Pentium-M fails, breaks system without any warning

[Chris Bainbridge]

** Summary changed:

- do-release-upgrade upgrade from Precise fails : This kernel does not support a non-PAE CPU.
+ do-release-upgrade from Ubuntu 12.04 on Pentium-M fails, breaks system without any warning

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  do-release-upgrade from Ubuntu 12.04 on Pentium-M fails, breaks system
  without any warning

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

Bug description:
  Attempting to upgrade from Precise with a non-PAE kernel will result
  in a failed upgrade. do-release-upgrade should check whether the user
  is using a non-PAE kernel and refuse to run, rather than upgrading to
  a broken system with no installed kernel.

  After downloading 1.5GB+ of data and over 1000 new packages, the
  upgrade will eventually report failure. Looking through the logs there
  is no kernel installed because of the error "This kernel does not
  support a non-PAE CPU.":

  Selecting previously unselected package linux-image-3.5.0-26-generic.^M
  Unpacking linux-image-3.5.0-26-generic (from .../linux-image-3.5.0-26-generic_3.5.0-26.42_i386.deb) ...^M
  This kernel does not support a non-PAE CPU.^M
  dpkg: error processing /var/cache/apt/archives/linux-image-3.5.0-26-generic_3.5.0-26.42_i386.deb (--unpack):^M
   subprocess new pre-installation script returned error exit status 1^M
  No apport report written because MaxReports is reached already

  Related bugs:

  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/897786 Kernel is dropping non-PAE flavour
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1068862 upgrade from 12.04 to 12.10 on a sans-pae CPU leaves kernel broken

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