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

[Mathieu Trudel-Lapierre]

Disabling Secure Boot temporarily in order to finish the installation
(mmx64.efi is supposed to be installed on disk at the end of the
install), or editing an installation image on USB to copy

grubx64.efi  in a new file called  mmx64.efi

Should be good workarounds for this.

Please don't run a system-rescue-cd or such custom "rescue" images to
manually remove files from /sys/firmware/efi/efivars -- it *can* be
done, but it's quite dangerous, likely to brick you system in a way that
*can't* be recovered. As per the above, the right fix is to finish the
installation and run the real mmx64.efi either by disabling Secure Boot
in your firmware (but NOT switching to Legacy boot) or making the
mmx64.efi available as a copy of grub.

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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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