linux-kernel - Re: [patch v2] Fixes and cleanups for earlyprintk aka boot console.

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Message-ID: <20070329163714.GA29059@suse.de>
Date:	Thu, 29 Mar 2007 18:37:14 +0200
From:	Olaf Dabrunz <od@...e.de>
To:	John Stoffel <john@...ffel.org>
Cc:	Gerd Hoffmann <kraxel@...e.de>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Ralf Baechle <ralf@...ux-mips.org>, Andi Kleen <ak@...e.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Paul Mackerras <paulus@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [patch v2] Fixes and cleanups for earlyprintk aka boot console.

On 15-Mar-07, John Stoffel wrote:
> Would this explain why recent version of GDM don't find the keyboard
> properly when you boot with a kernel command line of:
> 
>    kernel ... console=tty0 console=ttyS1,96008N1
> 
> until you stop and restart GDM?  This was filed under Debian bug
> #406457 (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=406457)
> and I could never figure it out until I removed my serial console line
> at one point.  

Try changing the order of the console= parameters:

    kernel ... console=ttyS1,96008N1 console=tty0

Some time ago I understood what this does. Nowadays I can only remember
that this makes both the serial console and directly attached
screen/keyboard console work most of the time. FWIW, tty0 becomes the
so-called "preferred console".

-- 
Olaf Dabrunz (od/odabrunz), SUSE Linux Products GmbH, Nürnberg

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