grub-install: error: cannot find EFI directory. dpkg: error processing package shim-signed (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing:

[wilmer fernandez]

root@ubuntu:/home/ubuntu# mount /dev/sda5 /mnt
root@ubuntu:/home/ubuntu# mount --bind /dev /mnt/dev
root@ubuntu:/home/ubuntu# mount --bind /dev/pts /mnt/dev/pts
root@ubuntu:/home/ubuntu# mount --bind /proc /mnt/proc
root@ubuntu:/home/ubuntu# mount --bind /sys /mnt/sys
root@ubuntu:/home/ubuntu# sudo chroot /mnt
root@ubuntu:/# grub-install --boot-directory=/boot/ --recheck /dev/sda5
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
root@ubuntu:/# mount | grep /boot/efi
root@ubuntu:/# grub-install --efi-directory=/mnt/efi
Installing for x86_64-efi platform.
grub-install: error: failed to get canonical path of `/mnt/efi'.
root@ubuntu:/# grub-install --efi-directory=/boot/EFI
Installing for x86_64-efi platform.
grub-install: error: failed to get canonical path of `/boot/EFI'.
root@ubuntu:/# update-grub2
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.15.0-38-generic
Found initrd image: /boot/initrd.img-4.15.0-38-generic
Found linux image: /boot/vmlinuz-4.10.0-28-generic
Found initrd image: /boot/initrd.img-4.10.0-28-generic
Adding boot menu entry for EFI firmware configuration
done
root@ubuntu:/# apt-get install grub-efi-amd64-signed
Reading package lists... Done
Building dependency tree
Reading state information... Done
grub-efi-amd64-signed is already the newest version (1.66.18+2.02~beta2-36ubuntu3.18).
0 upgraded, 0 newly installed, 0 to remove and 514 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up grub-efi-amd64-signed (1.66.18+2.02~beta2-36ubuntu3.18) ...
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
Setting up shim-signed (1.33.1~16.04.1+13-0ubuntu2) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package shim-signed (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 grub-efi-amd64-signed
 shim-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.4
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CasperVersion: 1.376.2
Date: Thu Nov 8 09:02:06 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
ProcEnviron:
 LANGUAGE=es_CO.UTF-8
 PATH=(custom, no user)
 LANG=es_CO.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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