[Bug 66791] Radeon fails to find vbios on macbook pro 2, 1 (2007) for x1600 using kernel EFI stub

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=66791

--- Comment #5 from Alex Deucher <alexdeucher at gmail.com> ---
IIRC, the efi stub driver fetches the vbios via EFI and copies it to the legacy
vga shadow location (0xc0000).  It's probably worth checking the efistub source
to see how it handles that for other systems to make sure you don't have to add
a special case for your laptop and to see if your system even makes a vbios
available via EFI at that point.

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