[Bug 1654779] Re: installer crashes on grub installation (forced UEFI install) calling 'grub-efi-amd64-signed' failed

[Phillip Susi]

Your disk is currently partitioned to boot in bios mode, but you booted
the 16.04 installer in EFI mode. A warning message prompted you that
this could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or partition the disk using GPT and set up an EFI system
partition to install in EFI mode. This will be done for you if you
choose the "use entire disk" guided install option.

** Changed in: grub-installer (Ubuntu)
       Status: New => Invalid

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Title:
  installer crashes on grub installation (forced UEFI install) calling
  'grub-efi-amd64-signed' failed

Status in grub-installer package in Ubuntu:
  Invalid

Bug description:
  Tried a clean install of 16.04 from a USB stick in UEFI mode. Got a warning, that another system (Win10) was installed on another disk in legacy mode and might not boot, if I used force UEFI mode. Commenced with forced UEFI install and at the end it stated:
  errors were encountered wjile processing 
  grub-efi-amd64-signed
  shim-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  info: Calling 'apt-install grub-efi-amd64-signed' failed.
  But I guess that's in the logfile as well.
  A sudo apt-get install grub-efi-amd64-signed seems to have been successful. But I'll have to reboot to see. Also I did sudo apt-get install shim-signed.
  Hope you can find the bug. If you can't I'll gladly assist you trying to recreate the same situation using an ssh oder whatever you prefere.
  #
  Description:	Ubuntu 16.04.1 LTS
  Release:	16.04

  apt-cache policy pkgname
  returns: N: Unable to locate package pkgname

  System:
  2 HDDs (tried to install Ubuntu on one of them, 1 ext4 1 swap partition and bootloader for Ubuntu were to be installed here)
  1 SSD with just Windows 10 64 bit on it
  i7-4770s
  R9-280X
  16GB RAM
  Asus M51AC PC
  USB stick was prepared using Rufus in GPT UEFI mode and FAT32 on a 32 GB sandisk cruzer in ISO mode

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.2 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CasperVersion: 1.376
  Date: Sat Jan  7 20:18:51 2017
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  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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