Public bug reported:
This concerns grub-efi-amd64 2.02-2ubuntu8.1 in Ubuntu 18.04/bionic.
When the grub-efi-amd64 package is initially installed on a system that
has not previously booted via the Ubuntu EFI bootloader (so /boot/efi/
is either empty, or at least does not have a /boot/efi/EFI/ubuntu/
directory), the package postinst script fails to install anything into
/boot/efi/.
The postinst script, in fact, contains this conditional around the grub-
install invocation:
if [ "$bootloader_id" ] && [ -d "/boot/efi/EFI/$bootloader_id" ];
then
It's not clear why this is here. There might be a reason why you would
not want to install/update the bootloader if the directory for it isn't
already there. In my case, however, I am running the postinst script
(via dpkg-reconfigure) precisely to populate an EFI partition from
scratch.
I can work around this issue with a simple
# mkdir -p /boot/efi/EFI/ubuntu
before running dpkg-reconfigure, but this is far from obvious.
An additional problem with the conditional is that if it fails, no
message is given to the user that the postinst is omitting the GRUB
install, let alone the reason why. If the user misses the absence of the
grub-install message, they'll only find out something went wrong when
they attempt to boot using the newly-installed bootloader and it doesn't
work.
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1783044
Title:
grub-efi-amd64 postinst fails to install GRUB if /boot/efi/EFI/ubuntu/
is not present
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