[Bug 1798171] Re: System fails to boot with \EFI\BOOT\mmx64.efi - Not Found

[dan ringer]

had the same error with Clear Linux:

Failed to open \EFI\org.clearlinux\mmx64.efi - Not Found
Failed to load image \EFI\org.clearlinux\mmx64.efi - Not Found

Failed to start MokManager: Not Found
Something has gone seriously wrong: import_mok_state() failed
: Not Found

doing this from #51:
# chattr -i /sys/firmware/efi/efivars/Mok*
# rm /sys/firmware/efi/efivars/Mok*

from Kali (multi boot) fixed it.

I multi boot win 10, macOS from clover, kali, Clear, openSUSE tumbleweed and Slackware on a test machine.  OpenSUSE recent update enabled secure boot and put the Mok* files there, I disabled secure boot, rewrote grub from there, double checked and deleted the Mok files from the last boot and that kept the problem from reoccurring.  
Thank you so much for clearing up this problem.

-Dan

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https://bugs.launchpad.net/bugs/1798171

Title:
  System fails to boot with \EFI\BOOT\mmx64.efi - Not Found

Status in debian-installer package in Ubuntu:
  Fix Released
Status in grub2 package in Ubuntu:
  Fix Released
Status in debian-installer source package in Disco:
  Fix Released
Status in grub2 source package in Disco:
  Fix Released

Bug description:
  System: Dell Inspiron 11 3137 - BIOS A05 Phoenix SecureCore Technology

  Cosmic desktop installation on UEFI system with secure boot enabled,
  third party drivers checked, installation on entire disk.

  On boot the system fails with:

  Failed to open \EFI\BOOT\mmx64.efi - Not Found
  Failed to load image \EFI\BOOT\mmx64.efi - Not Found
  Failed to start MokManager: Not Found
  Something has gone seriously wrong: import_mok_state() failed
  : Not Found

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-8-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  Date: Tue Oct 16 19:26:56 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper --
  InstallationDate: Installed on 2013-09-03 (1868 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
  ProcEnviron:
   LANG=C.UTF-8
   TERM=xterm-256color
   SHELL=/bin/bash
   PATH=(custom, no user)
  SourcePackage: ubiquity
  UpgradeStatus: Upgraded to cosmic on 2018-01-26 (263 days ago)

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