[Bug 1871963] Re: dpkg fails to install grub-efi-amd64 signed and shim-signed

[Philipp Classen]

Just had the same issue as Deepak. Same error after upgrading from 18.04
to 20.04, but I checked and apparently also had the fix of the semicolon
in /var/lib/dpkg/info/grub-efi-amd64-signed.postinst. So, there might be
another issue that is causing the same problem.

Running it with "set -x", I could see that the "/usr/lib/grub-multi-
install --target=$target" call was failing (with target=x86_64-efi). Why
it failed, I could not find out.

I was able to fix the installation problem by running the commands from
https://stackoverflow.com/a/53284186/783510:

# sudo apt-get purge grub\*
# sudo apt-get install grub-efi
# sudo apt-get autoremove
# sudo update-grub

After that, the apt-get errors were gone, and the installation could be
completed.

(Another issue, which I will mention as there is a tiny chance that it
is related, although I doubt it: After rebooting, I was not able to boot
(not even reaching the question for the passphrase). To solve it, I had
to disable Secure Boot, then I reached the state where I could enter my
passphrase to unlock the encrypted partition.)

My notebook: Lenovo ThinkPad X1 Carbon 4th

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https://bugs.launchpad.net/bugs/1871963

Title:
  dpkg fails to install grub-efi-amd64 signed and shim-signed

Status in dpkg package in Ubuntu:
  Invalid
Status in grub2-signed package in Ubuntu:
  Fix Released

Bug description:
  See above

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: dpkg 1.19.7ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Thu Apr  9 18:41:33 2020
  InstallationDate: Installed on 2020-04-09 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: dpkg
  UpgradeStatus: No upgrade log present (probably fresh install)

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