[Bug 260735] 1b33aa1f5f99e1270d526ffa5b652250ec80a7ef (amd64 UEFI loader: stop copying staging area to 2M physical) maybe not effective in some cases

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 28 Dec 2021 19:32:35 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260735

stanislso@yandex.com changed:

           What    |Removed                     |Added
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                 CC|                            |stanislso@yandex.com

--- Comment #6 from stanislso@yandex.com ---
(In reply to Graham Perrin from comment #4)

I am the original poster from the forums. I want to clarify a few points.

> so the install was done in CSM mode and loader.efi was copied to support UEFI boot.

Correct. If I attempted to install without CSM, I would experience an apparent
screen freeze after the EFI framebuffer information. I had to resort to using a
discreet video card to be able to enable CSM. Once the install was performed
(with manual partition creation), I set up the EFI partition and removed the
nVidia card from the system, thus booting the newly-installed system in UEFI
mode. 

> so stable/13 should also boot with the ASUS Prime B560-Plus 
>  in pure UEFI mode (more specifically: boot progress beyond 
>  EFI framebuffer information appearing on screen)

This was, sadly, not the case. To reproduce, it is enough to boot from the
memstick in non-CMS mode on that system.

If need be, I can test a newer memstick or a fix candidate, to see if I manage
to go past the EFI framebuffer information screen.

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