[Bug 1792575] Re: Boot failure with efi shims from 20180913.0

[Mathieu Trudel-Lapierre]

The package versions we need are for grub-efi-amd64 and grub-efi-
amd64-signed.

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Title:
  Boot failure with efi shims from 20180913.0

Status in MAAS:
  New
Status in shim package in Ubuntu:
  New

Bug description:
  We have had several nodes that had been deployed on Sept. 12 and were
  booting correctly fail to boot.

  On the console and during tracing we could see they were getting dhcp
  and pxe information, but then errored out with "relocation failed",
  dropping into a fallback grub menu with a Local boot option.

  After copying over bootx64.efi grubx64.efi from
  https://images.maas.io/ephemeral-v3/daily/bootloaders/uefi/amd64/20180906.0/
  instead of 20180913.0/ and rebooting, boot would commence
  successfully.

  Hardware: Dell R640
  maas 2.3.5-6511-gf466fdb-0ubuntu1~16.04.1

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