Hey! I repeatedly tried installing different versions of Ubuntu (namely Ubuntu Gnome 15.10, Ubuntu 16.04 and Ubuntu Gnome 16.04) and always get the same error stating: "GRUB installation failed. The 'grub-efi-amd64-signed' packaged failed to install into /target/. Without the GRUB boot loader, the installed system will not boot."
I googled the error and discovered that other users received it as well in the last years. I tried several of the suggested ways to solve the problem - without success.
I am a happy Ubuntu user since several years and would love to be one in the future. Working on Windows (which I have in dual boot) just doesn't do the trick :D
I would be very grateful for any helpful advice!
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CasperVersion: 1.376
Date: Sat Apr 30 19:28:38 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu-gnome.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 (20160421)
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)
Your EFI system partition appears to be hopelessly corrupt and will need to be reformatted and your other OSes reinstalled.