[Bug 1917529] Re: grub2-efi-amd64-signed 1.164+2.04-1ubuntu42 fails to display boot menu on 14.04 ESM

[Steve Beattie]

Attaching the generated /boot/grub/grub.cfg

** Attachment added: "trusty-ESM-grub.cfg"
   https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1917529/+attachment/5472023/+files/trusty-ESM-grub.cfg

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Title:
  grub2-efi-amd64-signed 1.164+2.04-1ubuntu42 fails to display boot menu
  on 14.04 ESM

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  Attempting to boot under secure boot/uefi on trusty ESM with the
  following packages installed:

  $ dpkg -l 'grub*' | grep ^ii
  ii  grub-common            2.02~beta2-9ubuntu1.22  amd64        GRand Unified Bootloader (common files)
  ii  grub-efi-amd64         2.04-1ubuntu42          amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 version)
  ii  grub-efi-amd64-bin     2.04-1ubuntu42          amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 modules)
  ii  grub-efi-amd64-signed  1.164+2.04-1ubuntu42    amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 version, signed)
  ii  grub2-common           2.02~beta2-9ubuntu1.22  amd64        GRand Unified Bootloader (common files for version 2)
  ii  grub2-themes-ubuntustudio 0.2                  all          GRand Unified Bootloader, version 2 (Ubuntu Studio theme)

  and with all GRUB_HIDDEN options disabled in /etc/default/grub:

  $ grep ^GRUB /etc/default/grub
  GRUB_DEFAULT=0
  GRUB_TIMEOUT=10
  GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  GRUB_CMDLINE_LINUX=""

  results in grub being unable to display the grub menu when booting.
  Pressing Esc also does not cause the menu to display; however, it is
  being recognized as it cause grub to stop its countdown (and thus
  never boot).

  This is a regression in that the same set of options with the prior
  round of updates published in the trusty ESM archive will successfully
  bring up the grub menu on boot, with the following packages installed:

  $ dpkg -l 'grub*' | grep ^ii
  ii  grub-common           2.02~beta2-9ubuntu1.21  amd64        GRand Unified Bootloader (common files)
  ii  grub-efi-amd64        2.02~beta2-9ubuntu1.21  amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 version)
  ii  grub-efi-amd64-bin    2.02~beta2-9ubuntu1.21  amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 binaries)
  ii  grub-efi-amd64-signed 1.34.24+2.02~beta2-9ubuntu1.21 amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 version, signed)
  ii  grub2-common          2.02~beta2-9ubuntu1.21  amd64        GRand Unified Bootloader (common files for version 2)
  ii  grub2-themes-ubuntustudio 0.2                 all          GRand Unified Bootloader, version 2 (Ubuntu Studio theme)

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