Re: [Mactel-linux-users] MacBook Pro 8.2

[Jerome B. <g62...@re...>]

On 22/11/11 06:20, mike dentifrice wrote:
> Johannes Graumann said:
>>> grub-efi is not yet mature enough to with play with.
>> Grrr ...
>
> Fortunately, that's not true.

I am glad to read that some progess has been made,
and that grub-efi is getting mature.

  I got a late 2011 MBP8,2 a few days ago,
> and I'm booting in pure EFI mode using the Integrated Graphics Device
> (IGD). Some issues remain though, as the radeon KMS is on by default
> during the first part of the boot sequence, resulting in a black screen
> or a garbled output depending upon the grub options you choose (it's a
> problem for me since I need to type the passphrase for my / partition).
>
> There's a patch though, which I haven't managed to get working yet, see
> https://bugs.freedesktop.org/show_bug.cgi?id=26891 (any help appreciatd)
>
> There's also a patch floating around to enable graphic switching through apple_gmux&  vga_swicheroo, but I'm not there yet.
>
> Anyways, to get the intel working, you need to apply the i915 lvds dual
> channer patch (I applied it to Linux 3.1.1 from sid):
> https://github.com/fooblahblah/linux-mainline-efi-lvds/blob/master/lvds_dual_channel.patch
>
> You then need to add the following to grub.cfg in your menuentry:
>
> 	# Switch gmux to IGD
> 	        outb 0x728 1
> 	        outb 0x710 2
> 	        outb 0x740 2
> 	# Powers down ATI
> 	        outb 0x750 0
>
> ...and the following as kernel options on the "linux" line:
>
> 	i915.lvds_channels=2 i915.modeset=1 i915.lvds_use_ssc=0
>

Jerome