[Bug 1995751] Re: update to 2.04-1ubuntu47.4 drops zz-update-grub

[Julian Andres Klode]

** Changed in: grub2 (Ubuntu Bionic)
       Status: Triaged => In Progress

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Title:
  update to 2.04-1ubuntu47.4 drops zz-update-grub

Status in grub2 package in Ubuntu:
  Invalid
Status in grub2-unsigned package in Ubuntu:
  Confirmed
Status in grub2 source package in Bionic:
  In Progress
Status in grub2-unsigned source package in Bionic:
  Confirmed

Bug description:
  [Impact]
  New kernels don't appear in boot menu after install

  [Test plan]
  On a bionic VM, purge all grub and shim packages.

  Test 1: Upgrade release EFI stack
  - Install shim-signed with only release pocket
  - Enable -updates and add the proposed package, and upgrade

  Test 2: Upgrade broken EFI stack
  - Install shim-signed with only release and updates pocket
  - Upgrade grub2 binaries from proposed

  Test 3: Install latest EFI stack
  - Install shim-signed with release, updates, proposed grub2 enabled.

  Test 1a: Upgrade hybrid release stack:
  (same as 1, but install shim-signed and grub-pc)
  Test 2a: Upgrade hybrid broken stack:
  (same as 2, but install shim-signed and grub-pc)
  Test 3a: Upgrade hybrid broken stack:
  (same as 2, but install shim-signed and grub-pc)

  In all cases check that no errors occur and the
  /etc/kernel/postinst.d/zz-update-grub script exists at the end.

  Test 10: (grub2-unsigned)

  Ensure that grub-efi-{amd64,arm64} binary cannot be installed with
  older grub2-common binary installed  / pulls in new binary.

  Test 20: (grub2-signed)

  Ensure that grub-efi-{amd64,arm64}-signed binary cannot be installed
  with older grub2-common binary installed / pulls in new binary.

  [Where problems could occur]
  Could have missed a grub-.* binary or gotten the versions wrong and cause file conflicts.

  [build in -security]
  SRU is built in -security and binary copied to facilitate releasing the security update to grub2-unsigned that needs it.

  [Original bug report]
  A user reported that the GRUB menu was no longer being updated on a freshly deployed bionic system, and that this appears to be because /etc/kernel/postinst.d/zz-update-grub has disappeared.

  # The version in the bionic-security pocket has it:
  ubuntu at akis:~$ dpkg -c grub-efi-amd64_2.04-1ubuntu44.1.2_amd64.deb | grep zz
  -rwxr-xr-x root/root       646 2021-03-03 11:42 ./etc/kernel/postinst.d/zz-update-grub
  -rwxr-xr-x root/root       646 2021-03-03 11:42 ./etc/kernel/postrm.d/zz-update-grub

  # The version in bionic-updates does not:
  ubuntu at akis:~$ dpkg -c grub-efi-amd64_2.04-1ubuntu47.4_amd64.deb | grep zz
  ubuntu at akis:~$

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