[Bug 1753518] Re: package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Ronan Mooney]

WORKAROUND:
From:

https://askubuntu.com/questions/1031066/errors-during-upgrade-
from-17-10-to-18-04-shim-signed-and-grub-efi-amd64-signed

    sudo su -
    cd /boot/efi/EFI
    mv ubuntu ubuntu-old
    apt install -f
    mv ubuntu-old ubuntu
    update-grub2
    exit


"It seems that the newer grub couldn't access the /boot/efi/EFI/ubuntu directory, for some reason. So since my system was booting normally, I want just to get rid off that error everytime I was using the apt. So I thought that workaround just to check it the installation would finish and it seems that worked. Lastly, I restored the ubuntu directory name just not mess around with my system's ability to boot. It seems, I forgot to mention to issue an update-grub2 afterwards. – George Tavantzopoulos"

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https://bugs.launchpad.net/bugs/1753518

Title:
  package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 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:
  thierry at ingatech-XPS-13-9343:~$ LC_ALL=C sudo apt dist-upgrade 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  1 not fully installed or removed.
  After this operation, 0 B of additional disk space will be used.
  Do you want to continue? [Y/n] 
  Setting up grub-efi-amd64-signed (1.93+2.02-2ubuntu8) ...
  Installing for x86_64-efi platform.
  Could not delete variable: Invalid argument
  grub-install: error: efibootmgr failed to register the boot entry: Block device required.
  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
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93+2.02-2ubuntu8
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  Date: Mon Mar  5 15:49:17 2018
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2017-11-17 (107 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  Python3Details: /usr/bin/python3.6, Python 3.6.4+, python3-minimal, 3.6.4-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu1
   apt  1.6~alpha7ubuntu2
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-03-01 (3 days ago)

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