[Bug 1799767] [NEW] grub menu not showing with SecureBoot enabled after update

[frank]

Public bug reported:

Started with Ubuntu Version 14.04 I always had SecureBoot enabled and also CSM (compatibility support module) enabled in BIOS of Motherboard ASUS Z170-A, BIOS 3802 03/15/2018.
On October, 13th i did the updates that UpdateManager showed in the morning.

After rebooting in the evening, afterwards the BIOS splash screen there was only a black screen. No grub menu, no booting in SecureBoot mode.
I tried different repairs (tool boot-repair, reinstalling grub, installing signed kernel transitional packages and so on, but nothing would help.

At the end I found out out, that switching CSM to disabled "solved" the
problem and it is now reproducible: Switching CSM on, no secure boot,
switching off, secure boot works.

But I did not wont to switch CSM off.

I also tried to get some help at ubuntuforum. But no luck.

See here
https://ubuntuforums.org/showthread.php?t=2404150

Since today I think it's a bug in shim or grub, because at the morning
of Oct, 13th these have been updated.

Regards

Frank

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.27
ProcVersionSignature: Ubuntu 4.15.0-38.41-lowlatency 4.15.18
Uname: Linux 4.15.0-38-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Wed Oct 24 20:36:17 2018
InstallationDate: Installed on 2016-04-03 (933 days ago)
InstallationMedia: Ubuntu-Studio 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: Upgraded to bionic on 2018-09-24 (30 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1799767

Title:
  grub menu not showing with SecureBoot enabled after update

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Started with Ubuntu Version 14.04 I always had SecureBoot enabled and also CSM (compatibility support module) enabled in BIOS of Motherboard ASUS Z170-A, BIOS 3802 03/15/2018.
  On October, 13th i did the updates that UpdateManager showed in the morning.

  After rebooting in the evening, afterwards the BIOS splash screen there was only a black screen. No grub menu, no booting in SecureBoot mode.
  I tried different repairs (tool boot-repair, reinstalling grub, installing signed kernel transitional packages and so on, but nothing would help.

  At the end I found out out, that switching CSM to disabled "solved"
  the problem and it is now reproducible: Switching CSM on, no secure
  boot, switching off, secure boot works.

  But I did not wont to switch CSM off.

  I also tried to get some help at ubuntuforum. But no luck.

  See here
  https://ubuntuforums.org/showthread.php?t=2404150

  Since today I think it's a bug in shim or grub, because at the morning
  of Oct, 13th these have been updated.

  Regards

  Frank

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.27
  ProcVersionSignature: Ubuntu 4.15.0-38.41-lowlatency 4.15.18
  Uname: Linux 4.15.0-38-lowlatency x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Wed Oct 24 20:36:17 2018
  InstallationDate: Installed on 2016-04-03 (933 days ago)
  InstallationMedia: Ubuntu-Studio 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=de_DE
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to bionic on 2018-09-24 (30 days ago)
  VarLogDistupgradeTermlog:

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