Re: What does it mean when GRUB fails to find a kernel symbol?

[José Luiz Santana Dias]

I don't know to make this configuration. I have little knowlegde in Linux. No 
understanding. I'm brazilian.

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________________________________
From: help-grub-bounces+jluizsantanadias=outlook.com@gnu.org 
<help-grub-bounces+jluizsantanadias=outlook.com@gnu.org> on behalf of Saj 
Goonatilleke <saj@discourse.org>
Sent: Saturday, September 9, 2023 4:59:56 PM
To: help-grub@gnu.org <help-grub@gnu.org>
Subject: Re: What does it mean when GRUB fails to find a kernel symbol?

Thanks, Pascal and Goh, for your replies.

(Your messages did not land in my mailbox, hence this self-reply.)

> Because the old core image lacks a symbol required by the new module.

I had assumed the symbol had been present in GRUB for a long time.
This was wrong.  grub_disk_native_sectors was renamed from
grub_disk_get_size somewhat recently.
I think this rename provides half the answer.

The other half probably has something to do with the storied history of
these machines.  They were updated in-place from a previous Debian major
release.  Something may have gone wrong there.  Perhaps we somehow ended
up with an old latent core image on one of our disks -- a core that was
built from before the symbol rename.

Anyway, yes, it seems this was another case of a core-module divergence.