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

[Ivan Larionov]

Bug 1839317 looks too similar to ignore the possibility of the same
underlying issue. There's other person there besides me who reports the
same behavior on amd64.

My Windows bootloader is fine.
I can boot Windows using my motherboard's EFI boot menu selector.
I can boot Windows if I downgrade GRUB to the version from Ubuntu 19.04 (2.02+dfsg1-12ubuntu2).

My setup is EFI + GPT. Secure Boot is disabled.

Partitions:

Device         Start       End   Sectors  Size Type
/dev/sda1       2048    821247    819200  400M EFI System
/dev/sda2     821248   1083391    262144  128M Microsoft reserved
/dev/sda3    1083392 210209396 209126005 99.7G Microsoft basic data (WINDOWS 10 SYSTEM IS HERE)
/dev/sda4  210210816 211257343   1046528  511M Windows recovery environment
/dev/sda5  211257344 420513791 209256448 99.8G Microsoft basic data
/dev/sda6  420513792 445679615  25165824   12G Linux filesystem (UBUNTU ROOT, EXT4)
/dev/sda7  445679616 468860927  23181312 11.1G Linux filesystem (UBUNTU HOME, XFS)

Mounts:

/dev/sda1 on /boot/efi
/dev/sda6 on /
/dev/sda7 on /home

/etc/default/grub custom options:

GRUB_TIMEOUT=5
GRUB_CMDLINE_LINUX_DEFAULT="quiet systemd.show_status=1"
GRUB_GFXMODE=2560x1440
GRUB_DISABLE_RECOVERY="true"
GRUB_DISABLE_SUBMENU=y
GRUB_GFXPAYLOAD_LINUX=keep
GRUB_FONT=/boot/grub/terminus-32b.pf2

/etc/grub.d/30_os-prober renamed to /etc/grub.d/07_os-prober

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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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