[Bug 1573409] Re: Grub install fails at end of Ubuntu 16.04 installation

[Saji Nediyanchath]

Background info: I already have a UEFI based windows 8.1 instance
installed in C drive(/dev/sda1), so I am trying for a dual boot
installation, which works fine with Ubuntu 15.10 live instance.

As 16.04 installation failed, I removed the USB drive and restarted, then I got the screen as seen in Image1.jpg, attached with this.
Then I tried to boot into 16.04 live USB, it gave me a kernel panic which you can see in Image2.jpg, attached with this.

I tried installing Ubuntu 15.10 again, it completed successfully, and
Grub also installed successfully. I then checked md5 hash of 16.04
image, it was ok, so the 16.04 image is fine.

I tried installing 16.04 again using another bootable USB image that I
created from the iso image, to be sure that the issue is not with the
USB drive. This time also the installation failed with same error.

After this error if I restart and try to boot from the live USB, it
fails with a kernel panic. This was same, during the both times I tried,
so I had to use 15.10 bootable USB, which started up normally without
and kernel panic, I tried installing Boot fixer in the live instance,
and fix grub, I followed the steps, as I understand it could not fix
GRUB in EFI mode, so it went for non-EFI installation, which succeeded,
but this failed to detect and list the Windows 8.1 UEFI based
installation that I already have.

So, this fix also failed, so I again booted into 15.10 live instance and
installed it again, after formatting the current non-working 16.04
instance, it completed successfully, I did a restart, GRUB was showing
all entries for Ubuntu and also for the Windows 8.1 too I tried booting
to Windows 8.1, that also worked fine.

I booted back to Ubuntu 15.10, updated repository indexes, was shown
option to upgrade, upgraded to Ubuntu 16.04 from there, this is how I
got into 16.04, with a working GRUB instllation.

Looks like there is some regression issue with GRUB installation stage
of the Ubiquity installer, in case of a dual boot EFI based scenario.

** Attachment added: "After 16.04 install fail, 16.04 live USB drive removed"
   https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1573409/+attachment/4644575/+files/Image1.jpg

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https://bugs.launchpad.net/bugs/1573409

Title:
  Grub install fails at end of Ubuntu 16.04 installation

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Ubuntu 16.04 installation fails in the end, at the Grub install step.
  I am using amd64 live usb.

  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: Fri Apr 22 11:33:54 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --- cdrom-detect/try-usb=true noprompt persistent
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   LANGUAGE=en_IN
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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