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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1302719

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1302719

Title:
  Allocation 2GB of EfiRuntimeServiceData breaks kernel boot

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Allocation of 2GB (in EFI application) as EfiRuntimeServiceData ubuntu 14.04 beta 2 (but have been noticed in previous versions too) makes the kernel hang. No early printks could be seen.
  Most suspicious call chain is:

  efi_enter_virtual_mode() -> efi_map_region() -> __map_region() ->
  kernel_map_pages_in_pgd() -> __change_page_attr_set_clr () ->
  __change_page_attr() -> __cpa_process_fault().

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