[Bug 1895912] Re: grub2 does not boot kernels built without CONFIG_EFI_STUB

[Ubuntu Foundations Team Bug Bot]

The attachment "proposed patch" seems to be a patch.  If it isn't,
please remove the "patch" flag from the attachment, remove the "patch"
tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the
team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

-- 
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/1895912

Title:
  grub2 does not boot kernels built without CONFIG_EFI_STUB

Status in grub2 package in Ubuntu:
  New

Bug description:
  After grub2 update that introduced patch entitled ubuntu-Make-the-
  linux-command-in-EFI-grub-always-try.patch, grub2 stopped loading
  kernels built without CONFIG_EFI_STUB on EFI machines when secure boot
  is not enabled.

  Attempting to do so fails with the following set of errors:

  error: kernel doesn't support EFI handover.
  error: you need to load the kernel first

  The issue is that grub_errno is never reset if the handoff to linuxefi
  fails because kernel was not built with CONFIG_EFI_STUB.  This causes
  the code at the end of the function to skip setting "loaded = 1",
  causing the 2nd error from the initrd loader.

  I'm attaching a small patch that appears to resolve the issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1895912/+subscriptions