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

[AArch64]

Public bug reported:

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.

** Affects: grub (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: ubuntu => grub (Ubuntu)

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https://bugs.launchpad.net/bugs/1839317

Title:
  Grub fails to chainload the Windows Boot Manager

Status in grub package in Ubuntu:
  New

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.

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