[Bug 1815698] Re: package grub-efi-amd64-signed 1.93.13+2.02-2ubuntu8.12 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Jeff Prince]

Both these packages are reported as broken after both a fresh install
and as an upgrade from 16.04.

   iF grub-efi-amd64-signed (1.93.13+2.02-2ubuntu8.12)
   iU shim-signed (1.37~18.04.3+15+1533136590.3beb971-0ubuntu1)

System failed to boot after the fresh install.  Successfully installed
16.04 and did a dist-upgrade when the GUI notification popped up.  I
still have the system up, if you need additional logs.

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Title:
  package grub-efi-amd64-signed 1.93.13+2.02-2ubuntu8.12 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:
  package error before installing

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93.13+2.02-2ubuntu8.12
  ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic x86_64
  NonfreeKernelModules: lkp_Ubuntu_4_15_0_43_46_generic_47
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  Date: Tue Feb 12 21:54:53 2019
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2018-09-01 (164 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2.1
   apt  1.6.8
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93.13+2.02-2ubuntu8.12 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-09-01 (164 days ago)

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