#162 error messages before the initial GRUB menu

(Opening a bug report after trying to raise this issue using e-mail and IRC earlier.)

A T440p with osboot after a power-on and before the main GRUB menu ([o] to load OS, [b] to run SeaBIOS etc.) briefly displays the following:

Welcome to GRUB!

error: variable `prefix' isn't set.
error: terminal `usb_keyboard' isn't found.

It would be nice to establish the root cause of those error messages and to fix it.

these error messages are benign. grub is in need of a total rewrite, for bare metal specifically (coreboot payload).

if you look at the prefix error for example

look at grub-core/kern/main.c in grub source code

in there look at the function grub_main

  grub_load_modules ();

see that line in there?

this needs the prefix to be set, but now see:

  grub_set_prefix_and_root ();

this line comes after that

changing it to go before, fixes it but caused other issues for me

that whole code is spaghetti bolognese

and not good bolognese