[Bug 1972035] Re: installed grub-efi on bios install on upgrade from 21.10 to 22.04

[Steve Langasek]

In Ubuntu 21.10, we always install both the EFI and BIOS bootloaders to
disk, so that future changes to the system's firmware don't break
compatibility with the OS.

The upgrade failure indicates that, at some point after installation,
the partition that was used as the EFI System Partition has been
reformatted and is no longer recognized as one; but you did not remove
the EFI grub package from your system so it's still expected to be
there.

My recommendation would be to NOT remove the ESP that Ubuntu configured.
But if you don't want to restore it, then you need to remove the grub-
efi-amd64-signed package from your system instead.

** Changed in: grub2 (Ubuntu)
       Status: New => Invalid

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Title:
  installed grub-efi on bios install on upgrade from 21.10 to 22.04

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  I have a weird use case where my old uefi macbook pro only works with
  the aging nvidia 340 drivers when using a bios install. This is
  necessary due to thermal problems with nouveau. after my most recent
  upgrade to 22.04 from 21.10 i get this error:

  
  Setting up grub-efi-amd64-signed (1.180+2.06-2ubuntu7) ...
  mount: /var/lib/grub/esp: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error.
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32
  Processing triggers for man-db (2.10.2-1) ...
  dpkg: dependency problems prevent processing triggers for shim-signed:
   shim-signed depends on grub-efi-amd64-signed | grub-efi-arm64-signed; however:
    Package grub-efi-amd64-signed is not configured yet.
    Package grub-efi-arm64-signed is not installed.

  dpkg: error processing package shim-signed (--configure):
   dependency problems - leaving triggers unprocessed
  Processing triggers for desktop-file-utils (0.26-1ubuntu3) ...
  Processing triggers for libc-bin (2.35-0ubuntu3) ...
  Errors were encountered while processing:
   grub-efi-amd64-signed
   shim-signed
  needrestart is being skipped since dpkg has failed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  
  It appears that the installer mistakenly configured itself for efi mode and has installed the wrong grub which is not uninstallable. The system weirdly functions properly aside from this message after every system update.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.10
  ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
  Uname: Linux 5.15.0-27-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   600:0:129:710361:2022-04-30 00:41:02.840038535 +0000:2022-05-06 20:53:00.766556933 +0000:/var/crash/grub-efi-amd64-signed.0.crash
   600:0:129:545317:2022-04-30 16:35:25.036099124 +0000:2022-04-30 16:35:24.920098211 +0000:/var/crash/shim-signed.0.crash
  CurrentDesktop: i3
  Date: Fri May  6 23:54:59 2022
  InstallationDate: Installed on 2022-04-19 (17 days ago)
  InstallationMedia: Ubuntu-Server 21.10 "Impish Indri" - Release amd64 (20211013)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-kitty
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to jammy on 2022-04-30 (6 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2022-04-30 00:47:45.133101
   Log time: 2022-04-30 00:47:52.012827
   Log time: 2022-04-30 00:48:42.091313

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