[Bug 1896358] Re: package grub-efi-amd64-signed 1.142.6+2.04-1ubuntu26.4 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Francis M]

Hitting this bug and unsure now if we can safel reboot the affected box.

  (#) root at wither:~
  >>> dpkg --configure -a
  Setting up grub-efi-amd64-signed (1.142.6+2.04-1ubuntu26.4) ...
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   grub-efi-amd64-signed

Unsure if this is actually accurate but I've seen reference to this
latest grub2-signed bug relating to an incorrectly configured ESP
partition.

Note: this this hapening on a machine with non-GPT partition tables:

  Disk /dev/nvme0n1: 476.96 GiB, 512110190592 bytes, 1000215216 sectors
  Disk model: KXG50ZNV512G TOSHIBA
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0xc3f69e73

  Device         Boot     Start        End   Sectors  Size Id Type
  /dev/nvme0n1p1           2048    2099199   2097152    1G fd Linux raid autodetect
  /dev/nvme0n1p2        2099200   10487807   8388608    4G fd Linux raid autodetect
  /dev/nvme0n1p3       10487808   77596671  67108864   32G fd Linux raid autodetect
  /dev/nvme0n1p4       77596672 1000215215 922618544  440G  5 Extended
  /dev/nvme0n1p5       77598720  874516479 796917760  380G 83 Linux
  /dev/nvme0n1p6      874518528 1000215215 125696688   60G 83 Linux

Open to guinea-pigging fixes if any are uploaded and/or providing more
information.

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Title:
  package grub-efi-amd64-signed 1.142.6+2.04-1ubuntu26.4 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  The package isn't being updated

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: grub-efi-amd64-signed 1.142.6+2.04-1ubuntu26.4
  ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55
  Uname: Linux 5.4.0-47-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.8
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Sun Sep 20 10:01:45 2020
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2020-08-13 (37 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.2ubuntu0.1
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.142.6+2.04-1ubuntu26.4 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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