Grub EFI amd64 no longer start EFI/Microsoft/Boot/bootmgfw.efi
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
grub2 (Ubuntu) |
Fix Released
|
High
|
Unassigned | ||
Eoan |
Fix Released
|
High
|
Unassigned |
Bug Description
[Impact]
Dual-boot users who have somehow had shim uninstalled from their system / Secure Boot disabled.
[Test case]
(system with dual-boot setup for Ubuntu and Windows)
1) uninstall shim/shim-signed from the system
2) Run 'sudo grub-install -v'; ensure grubx64.efi is installed as the ubuntu bootentry (check 'sudo efibootmgr -v')
3) Reboot.
4) In system firmware, ensure Secure Boot is disabled.
5) Attempt to start Windows from the Grub menu.
Verify that Windows is chainloaded from Grub successfully; without returning to the GRUB menu or restarting the whole system.
[Regression potential]
Minimal; this is returning the state of the code paths for linuxefi validation back to how they were in GRUB 2.02; the extra check for the Secure Boot state is unnecessary at that point since it will be run again later when validating the images. This affects all validation code paths on UEFI but the net effect of reverting that change should be nil due to the duplication of code that already exists.
---
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/
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-
Found initrd image: /boot/initrd.
Found Windows Boot Manager on /dev/sda1@
Adding boot menu entry for EFI firmware configuration
done
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: grub-efi-amd64 2.04-1ubuntu5
ProcVersionSign
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-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=fr_FR.UTF-8
SHELL=/bin/bash
SourcePackage: grub2
UpgradeStatus: Upgraded to eoan on 2018-11-14 (314 days ago)
tags: | removed: rls-ee-tracking |
tags: | added: id-5d978799ba24715c5ddcabc5 |
description: | updated |
Changed in grub2 (Ubuntu): | |
status: | Incomplete → In Progress |
Changed in grub2 (Ubuntu Eoan): | |
status: | Confirmed → Triaged |
Status changed to 'Confirmed' because the bug affects multiple users.