Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753884AbYHUFl4 (ORCPT ); Thu, 21 Aug 2008 01:41:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751571AbYHUFlr (ORCPT ); Thu, 21 Aug 2008 01:41:47 -0400 Received: from terminus.zytor.com ([198.137.202.10]:35127 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750948AbYHUFlr (ORCPT ); Thu, 21 Aug 2008 01:41:47 -0400 Message-ID: <48ACFF0B.6090008@zytor.com> Date: Wed, 20 Aug 2008 22:37:15 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: David Fries CC: Ingo Molnar , 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> <48AAEFBE.5060406@zytor.com> <20080821041721.GE17528@spacedout.fries.net> In-Reply-To: <20080821041721.GE17528@spacedout.fries.net> 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 Content-Length: 1259 Lines: 29 David Fries wrote: > 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. > Most likely it never gets reinitialized during resume. This is a bug, obviously. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/