From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755298AbYHUESw (ORCPT ); Thu, 21 Aug 2008 00:18:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751298AbYHUESm (ORCPT ); Thu, 21 Aug 2008 00:18:42 -0400 Received: from SpacedOut.fries.net ([67.64.210.234]:39576 "EHLO SpacedOut.fries.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbYHUESl (ORCPT ); Thu, 21 Aug 2008 00:18:41 -0400 Date: Wed, 20 Aug 2008 23:17:21 -0500 From: David Fries To: "H. Peter Anvin" Cc: Ingo Molnar , linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Pavel Machek , Thomas Gleixner Subject: Re: [PATCH] i486 CR4 oops, no_console_suspend Message-ID: <20080821041721.GE17528@spacedout.fries.net> References: <20080818040340.GB17528@spacedout.fries.net> <20080818064120.GA28941@elte.hu> <20080819033710.GD17528@spacedout.fries.net> <20080819093454.GG28713@elte.hu> <48AAEFBE.5060406@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48AAEFBE.5060406@zytor.com> User-Agent: Mutt/1.5.4i X-Greylist: Sender is SPF-compliant, not delayed by milter-greylist-3.0 (SpacedOut.fries.net [127.0.0.1]); Wed, 20 Aug 2008 23:17:29 -0500 (CDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 19, 2008 at 09:07:26AM -0700, H. Peter Anvin wrote: > Ingo Molnar wrote: > > > >i've had trouble no end with getting even kernel messages out to the > >serial console during critical phases of suspend/resume. (especially in > >combination with earlyprintk=ttyS0 - not surprisingly) > > > >Especially during resume the UART is initialized back to something > >really slow - 300 bauds or 9600 bauds. (depends on the chipset i guess) > >So even though it works, it will only worked reliably when i > >standardized all my baud settings to that very low setting. > > > > Probably depends on the BIOS, actually; I suspect you end up with the > standard BIOS setting, which is *usually* 9600 bps. I have grub, the kernel, and a getty all set to 115200, for suspend, resume, or reboot it's always 115200. With grub there's no BIOS guessing, it sets it to a configured state. -- David Fries http://fries.net/~david/ (PGP encryption key available)