[Bug 1585592] Re: Ubuntu 16.04 - grub-efi-amd64-signed failed to install into /target/

[Franklin]

I'm still suffering from this problem.

When installing without internet connection, it would fail with this
error messages (attachment 20_05_30.png).  Under this state, the
/var/log/syslog showed that it couldn't find package "grub-efi-
amd64-signed" and "shim-signed", which actually existed in the pool/
folder in the live USB (attachment 20_05_20.png).

I don't think it a GPT EFI-partition problem since I selected "using the
whole hard drive" and let the installer automatically partitioned it.
The partition table is "Valid GPT with protective MBR", as attachment
20_06_19.png).

With internet connected, it would succeed sometimes (but not always).

I think the problem is that, when installing grub-efi-amd64-signed it
couldn't read the CDROM repository.  When internet connected it may find
the package in the repository other than the CDROM one.  But I couldn't
find out why and had no idea about how to solve it.

** Attachment added: "Error messages (in Chinese)"
   https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1585592/+attachment/4851286/+files/VirtualBox_ezgo_31_03_2017_20_05_30.png

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https://bugs.launchpad.net/bugs/1585592

Title:
  Ubuntu 16.04 - grub-efi-amd64-signed failed to install into /target/

Status in grub-installer package in Ubuntu:
  New

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or
  System -> About Ubuntu

  Ubuntu 16.04 LTS - Release: 16.04

  
  2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center

  ubiquity 2.21.63 [modified:
  lib/partman/automaticaly_partition/question]

  
  3) What you expected to happen

  Install Ubuntu 16.04 on a 16GB USB flash disk (following this
  tutorial: http://ubuntuhandbook.org/index.php/2014/11/install-real-
  ubuntu-os-usb-drive/ )

  
  4) What happened instead

  <pre>
  May 25 10:31:24 ubuntu systemd[1]: Starting Network Manager Script Dispatcher Service...
  May 25 10:31:24 ubuntu dbus[1410]: [system] Successfuly activated service 'org.freedesktop.nm_dispatcher'
  May 25 10:31:24 ubuntu systemd[1]: Started Network Manager Script Dispatcher Service...
  May 25 10:31:24 ubuntu nm-dispatcher: req:1 'dhcp4-change' [enp3s0]: new request (1 script)
  May 25 10:31:24 ubuntu nm-dispatcher: req:1 'dhcp4-change' [enp3s0]: start running ordered scripts...
  </pre>

  Popup window: GRUB installation failed
  "The 'grub-efi-amd64-signed' package failed to install into /target/. Without the GRUB boot loader, the installed system will not boot."

  Probably, I forgot to disable secure boot on BIOS...?

  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
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.376
  Date: Wed May 25 07:56:52 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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