[Bug 1924605] Re: Grub2 menu not loading - could not create MokListXRT

[Achim Behrens]

What efivars did you delete because i am unsure what efivars i can
delete safely.

My by far largest efivars are:
-rw-r--r-- 1 root root 19308 Apr 20 22:49 MokListXRT-605dab50-e046-4300-abb6-3dd810dd8b23
-rw-r--r-- 1 root root 13504 Apr 20 22:49 dbx-d719b2cb-3d3a-4596-a3bc-dad00e67656f
-rw-r--r-- 1 root root  5552 Apr 20 22:49 MokListXRT2-605dab50-e046-4300-abb6-3dd810dd8b23
-rw-r--r-- 1 root root  5360 Apr 20 22:49 MokListXRT1-605dab50-e046-4300-abb6-3dd810dd8b23
-rw-r--r-- 1 root root  4213 Apr 20 22:49 db-d719b2cb-3d3a-4596-a3bc-dad00e67656f
-rw-r--r-- 1 root root  2549 Apr 20 22:49 KEK-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- 1 root root  2097 Apr 20 22:49 MokListRT-605dab50-e046-4300-abb6-3dd810dd8b23

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https://bugs.launchpad.net/bugs/1924605

Title:
  Grub2 menu not loading - could not create MokListXRT

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  Thinkpad T430 I5-3320M
  Ubuntu 21.04 (ZFS)
  Dual boot: Ubuntu and Windows 10 on separate drives

  Steps to reproduce:

  * system update using 'apt update' in terminal. I have attached apt log file. The problem appeared after 'Start-Date: 2021-04-15  19:40:02', last entry.
  * 'zsysctl service gc -vv' - to remove unnecessary states
  * restart the system

  Outcome:

  * Grub2 menu does not show. Instead, error messages appear: 
  'Could not create MokListXRT: Out of Resources'
  'Failed to set MokListXRT: Out of Resources'
  * After 10 sec Ubuntu starts (Ubuntu was previously set as default system)

  Expected outcome:
  * Grub2 menu with Ubuntu, Windows and recovery options

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: grub-efi (not installed)
  ProcVersionSignature: Ubuntu 5.11.0-14.15-generic 5.11.12
  Uname: Linux 5.11.0-14-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu62
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Apr 15 20:13:35 2021
  InstallationDate: Installed on 2021-03-15 (31 days ago)
  InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210315)
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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