[Bug 1872212] Re: grub-install: Operation not permitted

[Alex]

This just happened to me during a "routine" upgrade of a 20.04 system.

Setting up grub-efi-amd64-signed (1.142.9+2.04-1ubuntu26.7) ...
Installing grub to /boot/efi.
Installing for x86_64-efi platform.

A window pops up:

    GRUB failed to install to the following devices:
    /dev/nvme0n1p1
    Do you want to continue anyway? If you do, your computer may not start up properly.
    Writing GRUB to boot device failed - continue?

(saying "no" just loops back to the same screen)

grub-install: warning: Internal error.
grub-install: error: failed to register the EFI boot entry: Operation not permitted.

This is the last info line before the error when manually running grub-
install:

grub-install: info: Registering with EFI: distributor = `ubuntu', path =
`\EFI\ubuntu\shimx64.efi', ESP at hostdisk//dev/nvme0n1,gpt1.

No idea what to expect when I reboot.

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https://bugs.launchpad.net/bugs/1872212

Title:
  grub-install: Operation not permitted

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  I'm using Ubuntu 20.04 beta, upgraded from 19.10. 
  When doing the last upgrade I got an error message from grub.

  When I run ›dpkg-reconfigure shim-signed‹ I get this error:

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

  Since then I didn't reboot, for I'm afraid it won't work.

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