package grub-efi-amd64-signed failed to install: could not find EFI directory

[Raffael Krebs]

package grub-efi-amd64-signed 1.85.1+2.02~beta3-4ubuntu7.1 failed to install

I am on Ubuntu 17.10

The error occurred when I installed available updates with aptitude. This is the relevant log snippet:

Setting up grub-efi-amd64-signed (1.85.1+2.02~beta3-4ubuntu7.1) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package grub-efi-amd64-signed (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)
Setting up grub-efi-amd64-signed (1.85.1+2.02~beta3-4ubuntu7.1) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package grub-efi-amd64-signed (--configure):
 subprocess installed post-installation script returned error exit status 1

My EFI partition is not mounted anywhere by default. I then mounted it manually:
> sudo mount /dev/nvme0n1p1 /boot/efi

Then retried installation:
> sudo apt install package grub-efi-amd64-signed
[...]
Setting up grub-efi-amd64-signed (1.85.1+2.02~beta3-4ubuntu7.1) ...
Installing for x86_64-efi platform.
Installation finished. No error reported.
W: APT had planned for dpkg to do more than it reported back (0 vs 4).
   Affected packages: grub-efi-amd64-signed:amd64

That seemed to have worked but because of the warning at the end I reconfigured:
> sudo dpkg-reconfigure grub-efi-amd64-signed
Installing for x86_64-efi platform.
Installation finished. No error reported.

Seems to be ok now.

So if the installation script could automatically mount the EFI partition then it should work.

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: grub-efi-amd64-signed 1.85.1+2.02~beta3-4ubuntu7.1
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
Date: Wed Feb 7 11:05:48 2018
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-11-30 (68 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5.1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.85.1+2.02~beta3-4ubuntu7.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.