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

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Date:	Thu, 15 Mar 2007 16:58:58 -0400
From:	"John Stoffel" <john@...ffel.org>
To:	Gerd Hoffmann <kraxel@...e.de>
Cc:	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.

Gerd> The console subsystem already has an idea of a boot console,
Gerd> using the CON_BOOT flag.  The implementation has some flaws
Gerd> though.  The major problem is that presence of a boot console
Gerd> makes register_console() ignore any other console devices
Gerd> (unless explicitly specified on the kernel command line).

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.  

I'll have to try this patch out and let you and the GDM 2.16.x
developers know what happens.

John
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