[Bug 1839317] Re: Grub fails to chainload the Windows Boot Manager

[AArch64]

With `set debug="chain,secureboot,dl"` added to the Grub menu entry, we
get a flash of:

  SecureBoot: 0
  SetupMode: 0
  linuxefi_secure_validate: 1
  No shimlock protocol loader/efi/chainloader: Secure boot is not enabled

Looks like Grub is insisting on Secure Boot, which we need to disable in
order to boot Linux.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1839317

Title:
  Grub fails to chainload the Windows Boot Manager

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  After an update to 2.04 Grub fails to chainload into Windows.

  When selecting the menu item to boot into the Windows Boot Manager,
  the menu flashes and returns.

  When trying to chainload/boot via the Grub command line, nothing
  happens and the prompt reappears.

  When using the same commands in an earlier version (on a bootable USB
  stick) Windows sparks into life.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1839317/+subscriptions