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Re: Grub2 and Efi (MacBook 5,1)

From: Stefan Bienert
Subject: Re: Grub2 and Efi (MacBook 5,1)
Date: Tue, 22 Sep 2009 19:34:08 +0200
User-agent: Thunderbird (X11/20090912)

Michal Suchanek wrote:
> 2009/9/22 Stefan Bienert <address@hidden>:
>>>>>  timeout=10
>>>>> menuentry "Gentoo Linux 3 NOAGB NOEFI" {
>>>>>     root=(hd1,3)
>>>>>     loadbios /boot/vbios.bin /boot/int10.bin
>>>>>     linux /boot/kernel-2.6.27-gentoo-r8-n root=/dev/sda4 video=efifb
>>>>> agp=off noefi
>>>>> }
>>>>> menuentry "MacOSX" {
>>>>>  root=(hd1,2)
>>>>>  chainloader /usr/standalone/i386/boot.efi
>>>>> }
>>> I would just boot with video=efifb, no bioses, and no X.
>>> For me X sort of works with agp and no bios but I guess this is quite
>>> dependent on the graphics type.
>>> Thanks
>>> Michal
>> I tried changing my menu entries vie 'e' in the menu. Nothing works,
>> only with video=efifb, without noefi and all other sorts of
>> combinations. Could it be that I need some different video=...?
>> The last line of my boot-attempts is always something like "Video line
>> length".
> Not likely, the only video that reasonably works without a bios is efifb.
> On the other hand, if you boot with a video bios and with noefi you
> might get away with something like vga=normal, vga=ask  or
> video=vesafb or something like video=vga16fb.
> Unfortunately. grub refuses to pass on vga=ask for me.
> I am not sure what vbios is supposed to do for you. There is also the
> question when the graphics card is switched to vga. Normally the
> kernel expects the card to be in vga state so it should be probably
> done by grub., do we have any more dense tips, here? Sounds like the two of us
are somehow lost ;-) I tried playing around with video=... without any
success. Where can I find some docu on grub2 video and vga options?



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