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Re: UEFI Boot with Grub-Experimental

From: Stephen Kou
Subject: Re: UEFI Boot with Grub-Experimental
Date: Wed, 07 Jul 2010 18:39:55 -0700
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20100608 Thunderbird/3.1

Given that grub itself works as 64-bit, I assume that the EFI firmware is also 64-bit.  And the grub itself loads a 64-bit kernel, so I'm pretty sure everything is 64-bit in the pipeline. 

Would 64-bit grub-efi work on a 32-bit efi firmware?

On 7/7/2010 5:11 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
On 07/08/2010 01:49 AM, address@hidden wrote:
I've gotten UEFI booting working on some platforms, while other
platforms are not working.  Specifically, booting on Intel's own
motherobards using Intel's own BIOS software (Specifically, the SOX5810J
motherboard) does not seem to work.  I get the blank screen before the
kernel is about to come alive and after grub hands off execution to the
kernel.  It boots fine with the noefi flag, but without noefi it doesn't

Check that they bit size of Linux and EFI match. If they don't Linux crashes
I've tried all sorts of kernel flags to try to get some sort of output:
earlyprintk, debug=all, loglevel=7, vga=771, etc.  However, nothing
works -- the system is hung (numlock doesn't cause the LED to turn

Although I suspect this to be a kernel bug, could it be that grub is
setting up the video improperly or something?  The AMIBIOS boards have
some special video mode that uses the gnu unicode font.  The intel
boards only use the default system font.  

Any ideas on how to get some sort of output or kernel panic would be


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