[Bug 1927857] Re: Update to grub 2.04-1ubuntu44 breaks booting

[Julian Andres Klode]

Did you set GRUB_ENABLE_CRYPTODISK? Please attach your
/etc/default/grub.

Encrypted /boot is not really supported, the installer does not create
it, and no testing is performed on it. You have to hack around things
and add GRUB_ENABLE_CRYPTODISK to /etc/default/grub, so it's very hard
to setup.

Last time I tried encrypted /boot, it would prompt me for password, but
did not actually take any input.

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Title:
  Update to grub 2.04-1ubuntu44 breaks booting

Status in grub2-unsigned package in Ubuntu:
  New

Bug description:
  Update to grub 2.04-1ubuntu44 causes system to fail to reboot
  properly.

  (This is a continuation of Bug #1927853 .)

  #lsb_release -a

  LSB Version: core-9.20170808ubuntu1-noarch:printing-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
  Distributor ID: Ubuntu
  Description: Ubuntu 18.04.5 LTS
  Release: 18.04
  Codename: bionic

  Automatic software updater updated grub with target grub
  2.04-1ubuntu44

  #cat /var/log/apt/history.log
  Start-Date: 2021-05-08 18:11:35
  Commandline: aptdaemon role='role-commit-packages' sender=':1.62'
  Install: grub-efi-amd64-signed:amd64 (1.167~18.04.1+2.04-1ubuntu44, automatic)
  Upgrade: update-notifier-common:amd64 (3.192.1.9, 3.192.1.10), libsystemd0:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), libsystemd0:i386 (237-3ubuntu10.46, 237-3ubuntu10.47), grub-common:amd64 (2.02-2ubuntu8.21, 2.02-2ubuntu8.23), librbd1:amd64 (12.2.13-0ubuntu0.18.04.6, 12.2.13-0ubuntu0.18.04.7), grub2-common:amd64 (2.02-2ubuntu8.21, 2.02-2ubuntu8.23), udev:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), grub-pc:amd64 (2.02-2ubuntu8.21, 2.02-2ubuntu8.23), libudev1:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), libudev1:i386 (237-3ubuntu10.46, 237-3ubuntu10.47), grub-pc-bin:amd64 (2.02-2ubuntu8.21, 2.02-2ubuntu8.23), grub-efi-amd64-bin:amd64 (2.02-2ubuntu8.21, 2.04-1ubuntu44), libudev-dev:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), systemd-sysv:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), libpam-systemd:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), systemd:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), libnss-systemd:amd64 (237-3ubuntu10.46, 237-3ubuntu10.47), update-notifier:amd64 (3.192.1.9, 3.192.1.10), librados2:amd64 (12.2.13-0ubuntu0.18.04.6, 12.2.13-0ubuntu0.18.04.7)
  End-Date: 2021-05-08 18:14:04

  After subsequent shutdown, system fails to reboot correctly, leaving
  me at grub> prompt.

  System is UEFI
  HD is partitioned with ESP partition and encrypted partition.
  Encrypted partition contains lvm volumes (lvm-boot, lvm-root, lvm-home, etc)

  using grub> ls to find encrypted partition and performing grub>
  cryptomount makes lvm volumes accessible. Setting linux and initrd to
  appropriate files in lvm-boot allows subsequent successful boot.

  Upgrade procedure appears to have lost previous configuration.

  Looking at the /boot/efi/EFI/ubuntu/grub.cfg I see

  #cat /boot/efi/EFI/ubuntu/grub.cfg
  search.fs_uuid xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx root lvmid/yyyyyy-yyyy-yyyy-yyyy-yyyy-yyyy-yyyyyy/zzzzzz-zzzz-zzzz-zzzz-zzzz-zzzz-zzzzzz
  set prefix=($root)'/grub'
  configfile $prefix/grub.cfg

  The various UUIDs are all correct for my setup (UEFI. Clear-text ESP.
  Encrypted partition containing LVM volumes, with separate volumes for
  boot, root, home, var...)

  The search.fs_uuid will fail if the key for the encrypted partition
  has not been given and the encrypted partition opened via cryptomount
  first, so it looks like update-grub is missing something it didn't
  before, which, I guess, has something to do with the transition from
  grub 2.02 to grub 2.04.

  Running update-grub does not fix the problem.

  (Bug previously submitted without apport)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-bin 2.04-1ubuntu44
  Uname: Linux 5.12.2-051202-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  Date: Sun May  9 15:27:07 2021
  InstallationDate: Installed on 2017-09-05 (1342 days ago)
  InstallationMedia: Lubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  SourcePackage: grub2-unsigned
  UpgradeStatus: Upgraded to bionic on 2018-11-02 (918 days ago)

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