From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755307AbYHSQLo (ORCPT ); Tue, 19 Aug 2008 12:11:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752708AbYHSQLf (ORCPT ); Tue, 19 Aug 2008 12:11:35 -0400 Received: from terminus.zytor.com ([198.137.202.10]:54670 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751759AbYHSQLf (ORCPT ); Tue, 19 Aug 2008 12:11:35 -0400 Message-ID: <48AAEFBE.5060406@zytor.com> Date: Tue, 19 Aug 2008 09:07:26 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Ingo Molnar CC: David Fries , linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Pavel Machek , Thomas Gleixner Subject: Re: [PATCH] i486 CR4 oops, no_console_suspend References: <20080818040340.GB17528@spacedout.fries.net> <20080818064120.GA28941@elte.hu> <20080819033710.GD17528@spacedout.fries.net> <20080819093454.GG28713@elte.hu> In-Reply-To: <20080819093454.GG28713@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. -hpa