[Bug 1789313] Re: upgrade from 16.04.5 LTS to 18.04.1 LTS failed due to kernel signing issues and grub

[Phillip Susi]

*** This bug is a duplicate of bug 1788727 ***
    https://bugs.launchpad.net/bugs/1788727

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1788727, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** This bug has been marked a duplicate of bug 1788727
   upgrade crashing due to unsigned kernels

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1789313

Title:
  upgrade from 16.04.5 LTS to 18.04.1 LTS failed due to kernel signing
  issues and grub

Status in grub2 package in Ubuntu:
  New

Bug description:
  No further information beyond what is (hopefully?) auto attached to
  this bug report via an upload from the failed system (no web browser
  on it so I couldn't edit the bug report from that machine).

  The strange part is that there are only 3 kernels installed on the
  machine, and the 2 existing prior to trying to do-release-upgrade
  *are* both SIGNED.

  
  -rw------- 1 root root 8265464 Aug 15 08:57 /boot/vmlinuz-4.15.0-33-generic
  -rw------- 1 root root 7159744 Aug 10 07:20 /boot/vmlinuz-4.4.0-133-generic
  -rw------- 1 root root 7161656 Aug 16 06:04 /boot/vmlinuz-4.4.0-133-generic.efi.signed
  -rw------- 1 root root 7161824 Aug 15 13:48 /boot/vmlinuz-4.4.0-134-generic
  -rw------- 1 root root 7163736 Aug 24 06:06 /boot/vmlinuz-4.4.0-134-generic.efi.signed

  
  It's a Hyper-V VM, I had just done an apt update && apt upgrade && reboot to the machine prior to attempting the do-release-upgrade.

  Original release: 16.04.5 LTS
  Release-Upgrading to 18.04.1 LTS

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64 2.02-2ubuntu8.3
  ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140
  Uname: Linux 4.4.0-134-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Mon Aug 27 18:52:31 2018
  ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2016-05-12 (836 days ago)
  InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
  InvalidGrubScript: /etc/grub.d/25_custom
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-134-generic.efi.signed root=UUID=9c2c3603-e202-4054-bfa2-0d3b2ab1e307 ro
  Python3Details: /usr/bin/python3.6, Python 3.6.5, 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  1.6.3ubuntu0.1
  SourcePackage: grub2
  Title: package grub-efi-amd64 2.02-2ubuntu8.3 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-08-27 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1789313/+subscriptions