From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 13170] Macbook 5,2 only boots with acpi=off, or nosmp, or
	maxcpus=1
Date: Wed, 9 Mar 2011 17:08:31 GMT
Message-ID: <201103091708.p29H8VBE003954@demeter1.kernel.org>
References: <bug-13170-2300@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=13170





--- Comment #61 from Gregory Bellier <dest@gatekeeper.fr>  2011-03-09 17:08:26 ---
Hi !

After some digging, I'm now able to boot on Linux using a Macbook 5.2 and with
two cores.

refit + grub-pc with maxcpus = 1 => ok but only one core
refit + grub1.99-rc1 (efi and x86_64) => ok with two cores.

As I previously said, I managed to boot on the kernel but faced an error (or
should I say a new one) : "fb: conflicting fb hw usage nouveaufb vs EFI
VGA - removing generic driver".

This is due to a bug which I presume is in Nouveau. I reported it here:
https://bugs.freedesktop.org/show_bug.cgi?id=34508

To sum up, grub2 built for efi and x86_64 placed in the EFI partition. Within
the grub.cfg :
menuentry 'Linux without bios dump' {
        insmod efi_gop
        search --no-floppy --fs-uuid --set=root
d5175c18-7da2-49a9-a3af-844bad27c91d
        linux   /vmlinuz root=UUID=d5175c18-7da2-49a9-a3af-844bad27c91d ro
        initrd  /initrd.img
}
AND the final piece, NVidia driver then you'll be able to boot directly from
EFI to have the 2 cores.

There are several problems here.

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