linux-kernel - kexec and framebuffer

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Message-ID: <44BB9A7A.4060100@smartlink.ee>
Date:	Mon, 17 Jul 2006 17:11:06 +0300
From:	Kalev Lember <kalev@...rtlink.ee>
To:	linux-kernel@...r.kernel.org
Subject: kexec and framebuffer

Hello,

Kexec skips video initialization code and because of that framebuffer
does not work with relocated kernels.
Like Eric W. Biederman pointed out in
http://www.ussg.iu.edu/hypermail/linux/kernel/0508.0/1674.html ,
screen_info structure from include/linux/tty.h must be passed along to
maintain current video mode.

I made some testing and it's enough to dump screen_info structure from
running kernel and overwrite this info in kexec' x86-linux-setup.c.

I am wondering what would be the preferred method to extract screen_info
from running kernel. Should this be made available from sysfs or maybe a
new system call be created?

-- 
Kalev Lember
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