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Re: Use PBR with BIOS Boot Partition, not blocklists?

From: Jordan Uggla
Subject: Re: Use PBR with BIOS Boot Partition, not blocklists?
Date: Mon, 12 Dec 2011 23:19:47 -0800

On Tue, Dec 6, 2011 at 7:44 PM, Isaac Dupree
<address@hidden> wrote:
> Hi GRUB-ers,
> Apple's BIOS implementation, at least on my Macbook2,1 , flips out and fails
> to boot if you put GRUB* in the usual MBR location.**

If this is true then it's not something that grub developers are aware
of. Grub as a project often has to work around braindead firmware, but
until it's clear that this is needed as a work around for bugs in
Apple's BIOS implementation (or for another good reason) I don't see
grub supporting using the BIOS Boot Partition as an embedding area
when not installing to the mbr.

First, please run "grub-install /dev/sda" with no other work arounds
(preferably with grub 1.99) then run boot info script and post the
RESULTS.txt which it produces (to see if there are any other obvious
problems which might be causing boot to fail). If it does appear that
a work around is needed for Apple's firmware then a bug should be
filed against grub so an official work around can be created. Vague
reports on a wiki aren't helpful when trying to debug a problem like
this, so if a work around is needed we really need someone like you
who is experiencing the problem to work with the grub developers to
figure things out.

Jordan Uggla (Jordan_U on

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