[Bug 1891718] Re: [Regression] breaks GRUB install on an nvme device

[dann frazier]

** Bug watch added: github.com/rhboot/efivar/issues #157
   https://github.com/rhboot/efivar/issues/157

** Also affects: efivar via
   https://github.com/rhboot/efivar/issues/157
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1891718

Title:
  [Regression] breaks GRUB install on an nvme device

Status in Efivar:
  Unknown
Status in efivar package in Ubuntu:
  New
Status in efivar source package in Focal:
  New
Status in efivar source package in Groovy:
  New

Bug description:
  After upgrading a system from bionic to focal, grub-install began to
  fail:

  $ sudo /usr/sbin/grub-install 
  Installing for x86_64-efi platform.
  /usr/sbin/grub-install: warning: Internal error.
  /usr/sbin/grub-install: error: failed to register the EFI boot entry: Operation not permitted.

  The issue seems to stem from libefiboot1. With upstream release 35:

  # LD_PRELOAD=/home/ubuntu/efivar/src/libefiboot.so /bin/efibootmgr -q -c -d /dev/nvme0n1 -p 1 -w -L grub -l \\EFI\\grub\\grubx64.efi -v
  #

  But with 36:
  # LD_PRELOAD=/home/ubuntu/efivar/src/libefiboot.so /bin/efibootmgr -q -c -d /dev/nvme0n1 -p 1 -w -L grub -l \\EFI\\grub\\grubx64.efi -vCould not prepare Boot variable: No such file or directory

  
  git bisect of upstream efivars hit the following commit:
  # first bad commit: [ff696a432bf92af1206e235a60ad28b58ff0ab92] Move nvme parsing to linux-nvme.c

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