[Bug 1565674] Re: when install ubuntu 16.04 beta 2 after window 8.1 (dual boot) , Grub installation failed.Show message is " The grub-efi-amd64-signed package failed to install into /terget

[Alberto Salvia Novella]

** Changed in: grub-installer (Ubuntu)
   Importance: Undecided => Critical

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Title:
  when install ubuntu 16.04 beta 2 after window 8.1 (dual boot) ,Grub
  installation failed.Show message is " The grub-efi-amd64-signed
  package failed to install into /terget

Status in grub-installer package in Ubuntu:
  Confirmed

Bug description:
  Grub 2 install error

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.51
  ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
  Uname: Linux 4.4.0-15-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.368
  Date: Mon Apr  4 15:27:09 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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