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Re: Macbook, Efi, Display mode

From: Bean
Subject: Re: Macbook, Efi, Display mode
Date: Mon, 28 Sep 2009 02:39:10 +0800

On Sun, Sep 27, 2009 at 11:44 PM, Stefan Bienert
<address@hidden> wrote:
> Bean wrote:
>> On Sun, Sep 27, 2009 at 9:00 PM, Stefan Bienert
>> <address@hidden> wrote:
>>> For me, the screen freezes, so graphics seem not to be cleared.
>>>> I could perhaps try the efi graphics driver on some iMacs later
>>>> this/next week (depending on the location where you are reading this).
>>> That would be nice. I use Bean's repository.
>> Hi,
>> Most likely it doesn't get the frame buffer address right, so screen
>> is written to somewhere else, this also consist with the fact you
>> don't see any console output until x starts.
>> BTW, when you use the linux command, it should show some line about
>> detected video card info, can you paste it here.
> Ok, here is what I get after choosing the linux menu entry. Everything
> before the menu shows up, is to quick to read.
> OUTPUT-Start
> Rom image present.
>  [Linux-bzimage, setup=0x2c00, size=0x2784a0]
>  Video mode: 1280x800-32
>  Frame buffer base: 0x80010000
>  Video line length: 8192
> I hope this is the requested info. Do provide other stuff, I probably
> need a detailed instruction.


This looks legit for me, I don't know why it does work, perhaps it
write to the other video card ?

> BTW, I cannot switch to terminal from X after starting with Grub2.

Yep, this is normal. EFI uses non zero gart address, but linux assume
0. X would reset gart, but after it exits, the original gart address
is restored and which would cause problem.


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