[Bug 1854115] Re: package grub-efi-amd64-signed 1.128.1+2.04-1ubuntu12.1 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Tim Nolte]

I found that this was due to System76 Pop!_OS kernels having gotten
installed, which also explains when those were installed why I problems
booting them and had to manually boot to the 5.0 signed kernel.
Something to be aware of is that the System76 PPA is not just for their
DDE but for the entire system.

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Title:
  package grub-efi-amd64-signed 1.128.1+2.04-1ubuntu12.1 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:
  Message popped up on reboot.

  Errors during software update.

  ProblemType: Package
  DistroRelease: Ubuntu 19.10
  Package: grub-efi-amd64-signed 1.128.1+2.04-1ubuntu12.1
  ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7
  Uname: Linux 5.3.0-23-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  Date: Tue Nov 26 19:18:23 2019
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2019-05-05 (205 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  Python3Details: /usr/bin/python3.7, Python 3.7.5rc1, python3-minimal, 3.7.5-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.17rc1, python-minimal, 2.7.17-1
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu2
   apt  1.9.4
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.128.1+2.04-1ubuntu12.1 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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