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

[Panu Kalliokoski]

I was able to solve this with the information from comment #25.

I booted my system with a separate system rescue CD stick (see
http://www.system-rescue-cd.org/).  Then, in rootshell, I did:

# chattr -i /sys/firmware/efi/efivars/Mok*
# rm /sys/firmware/efi/efivars/Mok*

After this, the Ubuntu installer is able to boot from stick.

Note that the actual error is *not* this:
Failed to open \EFI\BOOT\mmx64.efi - Not Found
Failed to load image \EFI\BOOT\mmx64.efi - Not Found

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

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

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

Status in grub2 package in Ubuntu:
  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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