[Bug 1795807] Re: package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Andrei Borzenkov]

There is no RAID on my system. And how is it relevant in the first
place? The error happens when efibootmgr tries to modify EFI variables.
This succeeds immediately after reboot and fails if done later. Which I
already explained in

https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1767474
https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1753518

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Title:
  package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 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:
  Incomplete

Bug description:
  Description:	Ubuntu 18.04.1 LTS
  Release:	18.04

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6
  ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
  Uname: Linux 4.15.0-36-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  Date: Wed Oct  3 09:14:18 2018
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2016-05-14 (871 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  Python3Details: /usr/bin/python3.6, Python 3.6.6, python3-minimal, 3.6.5-3ubuntu1
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.5
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-09-28 (4 days ago)

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