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

[Dariusz Kolasinski]

Same result here,  hypervisor: Hyper-V.
Partition table: GPT

Here is command dpkg uses to upgrade grub:
root at host ~ # grub-install --efi-directory=/boot/efi --target=x86_64-efi  /dev/sda 
Installing for x86_64-efi platform.
grub-install: warning: Internal error.
grub-install: error: failed to register the EFI boot entry: Operation not permitted.

Here is the same command with: --no-nvram

root at host ~ # grub-install --efi-directory=/boot/efi --target=x86_64-efi --no-nvram  /dev/sda 
Installing for x86_64-efi platform.
Installation finished. No error reported.

It looks like it is related to Hyper-V.

I`ve tried to use dpkg-reconfigure grub-efi-amd64 to set update_nvram
false, but dpkg is still not using the --no-nvram flag:

root at host /var/lib/dpkg # debconf-show grub-efi-amd64 | fgrep nvram
* grub2/update_nvram: false

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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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