[Bug 1845289] Re: Grub EFI amd64 no longer start EFI/Microsoft/Boot/bootmgfw.efi

[Mathieu Trudel-Lapierre]

This bug is *not* a duplicate of 1839317; since we're not looking at
ARM-based systems here.

Could you please update your grub-efi-amd64 and grub-efi-amd64-signed
packages (well, make sure your system is fully up to date), then run:

sudo grub-install -v

And include the output here.

Not all the failures here are for the same causes:

Joseph Maillardet (jokx), it looks like the packages are not all
installed correctly, though I am not sure why (grub-install will tell);
so you are booting GRUB directly, not through shim, so Secure Boot is
being skipped in fun ways. This means chainloading Windows from GRUB is
unlikely to work.

Ivan, it sounds like your Windows no longer has a bootloader --
otherwise you should still see "Windows Boot Manager" work to boot
Windows. If you see GRUB again, then it means something went missing on
disk, in which case, per my comment #6, we would need to see what is on
disk under /boot/efi.

** Changed in: grub2 (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1845289

Title:
  Grub EFI amd64 no longer start EFI/Microsoft/Boot/bootmgfw.efi

Status in grub2 package in Ubuntu:
  Incomplete
Status in grub2 source package in Eoan:
  Confirmed

Bug description:
  On a dual boot computer with Windows 10 Pro and Ubuntu 19.10, since a
  month, Grub was unable to boot Windows 10. Hitting the Windows entry
  line give me a 0.1s black screen and get me back to Grub Menu.

  sudo update-grub give me :

  Sourcing file `/etc/default/grub'
  Sourcing file `/etc/default/grub.d/init-select.cfg'
  Generating grub configuration file ...
  Found linux image: /boot/vmlinuz-5.3.0-10-generic
  Found initrd image: /boot/initrd.img-5.3.0-10-generic
  Found Windows Boot Manager on /dev/sda1@/EFI/Microsoft/Boot/bootmgfw.efi
  Adding boot menu entry for EFI firmware configuration
  done

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: grub-efi-amd64 2.04-1ubuntu5
  ProcVersionSignature: Ubuntu 5.3.0-10.11-generic 5.3.0-rc8
  Uname: Linux 5.3.0-10-generic x86_64
  ApportVersion: 2.20.11-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Sep 25 08:01:05 2019
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: Upgraded to eoan on 2018-11-14 (314 days ago)

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