[Bug 633983] Re: Can't boot Maverick beta amd64 live cd on macbook (EFI)

[Heiko Przybyl]

Hi, probably a tiny bit too late, but did you try out a (very) recent
grub version? I for myself was persecuted by the boot problem starting
with amd64 releases of ubuntu 9.xy on my MacBook3,1. Until today I ran a
custom grub 1.96 setup on my EFI partition (I expect 1.98 to behave the
same). I decided to give its bzr live development branch a try [1] and
it fixes the broken ramdisk loading for me (I am now able to boot an
official ubuntu kernel instead of the vanilla non-initrd workarounds I
was used to). Only problem seems to be the working of video=efifb.
Screen got blank somwhere in between booting (I'd guess when
encountering conflict between efifb and intel(drm)fb [2]) and stayed
blank, but luckily the gdm-startup sound/input sound was hearable. So I
did a blank login (no change) and then did close/open the lid and
trigger a sleep/wakeup cycle, which amazingly brought up the running X
session, I'm writing from. Maybe I should just use video=inteldrmfb
instead of video=efifb as boot parameter, though my vanilla kernel with
video=efifb (and without inteldrmfb support) didn't show the blank
screen issue.

[1]
[heiko:hal][~] >> grub-mkimage -V         
grub-mkimage (GRUB) 1.99~beta0

[2]
[    3.324964] fb: conflicting fb hw usage inteldrmfb vs EFI VGA - removing generic driver
[    3.326817] Console: switching to colour dummy device 80x25
[    3.600250] Console: switching to colour frame buffer device 160x50
[    3.602903] fb0: inteldrmfb frame buffer device

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Can't boot Maverick beta amd64 live cd on macbook (EFI)
https://bugs.launchpad.net/bugs/633983
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