[Bug 1912264] [NEW] Provide grub 2.04 EFI backport on bionic

[Dimitri John Ledkov]

Public bug reported:

[Impact]

 * Provide grub 2.04 backport to bionic for improved TPM support.

[Test Case]

 * Install grub2.04-signed on bionic amd64 or arm64

 * Reboot, check that echo ${package_version} shows 2.04

 * Upgrade to focal

 * Observer that upgrade is correct and grub2.04-signed is now a dummy
transitional package

[Where problems could occur]

 * One must be able to remove grub2.04-signed & downgrade back to grub
2.02 based -bin and -signed packages. And binaries in /boot must be
updated.

 * One must be able to mix&match userspace grub packages tooling from
release/security/updates/proposed, whilst keeping grub2.04-signed
installed.

 * One must be upgraded to stock grub2.04 -bin / -signed packages upon
dist-upgrade to focal.

[Other Info]
 
 * Targetted to be installed by default on some cloud images.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1912264

Title:
  Provide grub 2.04 EFI backport on bionic

Status in grub2 package in Ubuntu:
  New

Bug description:
  [Impact]

   * Provide grub 2.04 backport to bionic for improved TPM support.

  [Test Case]

   * Install grub2.04-signed on bionic amd64 or arm64

   * Reboot, check that echo ${package_version} shows 2.04

   * Upgrade to focal

   * Observer that upgrade is correct and grub2.04-signed is now a dummy
  transitional package

  [Where problems could occur]

   * One must be able to remove grub2.04-signed & downgrade back to grub
  2.02 based -bin and -signed packages. And binaries in /boot must be
  updated.

   * One must be able to mix&match userspace grub packages tooling from
  release/security/updates/proposed, whilst keeping grub2.04-signed
  installed.

   * One must be upgraded to stock grub2.04 -bin / -signed packages upon
  dist-upgrade to focal.

  [Other Info]
   
   * Targetted to be installed by default on some cloud images.

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