[Bug 296422] EFI loader framebuffer corruption on MacPro3,1 (Early 2008) with ATI Radeon HD 2600 XT (RV630)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296422

Ahmad Khalifa <vexeduxr@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |vexeduxr@FreeBSD.org

--- Comment #10 from Ahmad Khalifa <vexeduxr@FreeBSD.org> ---
I think the discrepancy between 14.3 and 14.4 could be because of
4832232096f8e691563e5200b9f0d86d158bc51a

The 14.3 screenshot is elusive since it's in text mode, which means that it
never attempts to draw to the framebuffer. After the commit above it should go
to framebuffer mode, which it does here, and remnants of the graphical FreeBSD
orb can be seen.

My best guess would be that the stride/offset values for this model are missing
here:
https://ron-dev.freebsd.org/FreeBSD/src/src/branch/main/stand/efi/loader/framebuffer.c#L395

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