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

[Jay Tuckey]

Hi @cyphermox, I have tested with F12 on my Alienware Alpha:
* F12
* Select Windows Boot Manager
* Goes straight to grub

So no difference regardless of which boot option I select.

How was the installation done?
I installed Ubuntu 19.04 the upgraded to 19.10.

Here's my disk layout:
~> sudo parted /dev/sda print
Model: ATA Samsung SSD 860 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name                          Flags
 1      1049kB  512MB   511MB   fat32                                      boot, esp
 2      512MB   513GB   512GB   ext4
 3      513GB   513GB   16.8MB               Microsoft reserved partition  msftres
 4      513GB   1000GB  488GB   ntfs         Basic data partition          msftdata

Could you please describe how the disk was partitioned for dual-booting, and the steps taked in the installer?
I can't remember exactly what I did, as it was quite a while ago. However, the basic steps were:
* Install Ubuntu using 512GB
* Install Win10 into the remaining space
* Boot the Ubuntu usb and chroot into the installed ubuntu and re-install grub there.

Is there any extra info you want me to collect about my PC?

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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:
  Confirmed
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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