On Tue, 22 Nov 2022 09:12:00 +1100
Stephen Morris <samor...@netspace.net.au> wrote:

> > On Mon, 21 Nov 2022 18:54:49 +1100
> > Stephen Morris <samor...@netspace.net.au> wrote:
> >  
> >> Hi,
> >>       I am getting the following error message displayed before the
> >> display of the grub boot menu, can someone explain to me what this
> >> means and why it is occurring in F37 when it was never produced in
> >> F36, and what I need to do to rectify it?
> >>
> >>                   error:
> >> ../../grub-core/kern/efi/sb.c:169:prohibited by secure boot policy
> >>  
[snip]
> These issues seem to be tied to the fact that F37 is now booting with 
> Grub and not with what F36 was booting with (possibly systemd?), and
> in F37 the grub-gfxmode statement in /etc/default/grub that worked
> fine in F36 does not work in F37 even though the associated
> statements are added to grub.cfg, they seem to be being ignored (I'm
> thinking about raising another thread on this issue).

I think you are correct that this is related to the changes to grub
boot.  I did a search, and the only relevant thing I came up with for
sb.c was:

https://elixir.bootlin.com/linux/latest/source/fs/ubifs/sb.c

It has something to do with writing architecture to the disk.

The relevant link for grub-core seems to be

https://ask.fedoraproject.org/t/grub-core-error-you-need-to-load-the-kernel-first/14405

and seems to have something to do with tpm.
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