[Bug 1816249] Re: package grub-efi-amd64-signed 1.110.2+2.02+dfsg1-5ubuntu8.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Justin Philpott]

For me I can give some context:
- DELL XPS 9370
- Installed 18.04, dual boot, part of which I think meant that I needed secure boot (may be wrong)
- Attempted to upgrade Kernel to fix some bluetooth issues (known bugs) using UKUU
- Kernel install went OK, grub updated, but then on reboot the system complains that the kernel is not signed
- Attempted upgrade to 18.10, failed on same issue to new kernel not being signed
- But rebooted and checked kernel and it had updated OK to 4.18...
Thanks all I know... hope it helps.

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https://bugs.launchpad.net/bugs/1816249

Title:
  package grub-efi-amd64-signed 1.110.2+2.02+dfsg1-5ubuntu8.2 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:
  idk

  ProblemType: Package
  DistroRelease: Ubuntu 18.10
  Package: grub-efi-amd64-signed 1.110.2+2.02+dfsg1-5ubuntu8.2
  ProcVersionSignature: Ubuntu 4.18.0-15.16-generic 4.18.20
  Uname: Linux 4.18.0-15-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.10-0ubuntu13.2
  Architecture: amd64
  Date: Sat Feb 16 09:51:31 2019
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2019-02-07 (8 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
  Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu5
   apt  1.7.2
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.110.2+2.02+dfsg1-5ubuntu8.2 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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