[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: grub-dumpbios

From: Vladimir 'phcoder' Serbinenko
Subject: Re: grub-dumpbios
Date: Tue, 5 May 2009 14:25:49 +0200

On Tue, May 5, 2009 at 2:23 PM, Vladimir 'phcoder' Serbinenko <address@hidden> wrote:

> ... as Stefan points out (thanks Stefan) this may not be so
> straightforwarded.  I don't think this kind of tweaking is suitable
> for a setup that "Joe user" will get by default.
> Btw, if the video rom can be obtained directly from memory, why doesn't
> GRUB read it in runtime instead?

Actually, the modified rom is what we need, as it contains information
such as DDC table which is detected on POST, the original rom is not
very useful in this respect.

A better approach would be to fetch the rom from pci, then emulate the
POST process in grub2. But this need to port code from x86emu.
Default boot.efi passes to OSX kernel a blob device-properties containing some information about graphic and sound card. I'm nearly sure that it's retrieved from EFI and have an idea how but am not entirely sure yet.

Forgot the most important question: does it help in any way to generate a suitable dump within grub itself?
Vladimir 'phcoder' Serbinenko

reply via email to

[Prev in Thread] Current Thread [Next in Thread]