From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264901AbTL1Apw (ORCPT ); Sat, 27 Dec 2003 19:45:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264905AbTL1Apw (ORCPT ); Sat, 27 Dec 2003 19:45:52 -0500 Received: from smtp813.mail.sc5.yahoo.com ([66.163.170.83]:61368 "HELO smtp813.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S264901AbTL1Apv convert rfc822-to-8bit (ORCPT ); Sat, 27 Dec 2003 19:45:51 -0500 From: Dmitry Torokhov To: Andrew Morton , Tomas Szepe Subject: Re: Synaptics problems in -mm1 Date: Sat, 27 Dec 2003 19:45:44 -0500 User-Agent: KMail/1.5.4 Cc: gcs@lsc.hu, linux-kernel@vger.kernel.org, petero2@telia.com, john stultz References: <20031224095921.GA8147@lsc.hu> <20031227183704.GD10491@louise.pinerecords.com> <20031227160053.11bcd12d.akpm@osdl.org> In-Reply-To: <20031227160053.11bcd12d.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Message-Id: <200312271945.44559.dtor_core@ameritech.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 27 December 2003 07:00 pm, Andrew Morton wrote: > Tomas Szepe wrote: > > > I think it ACPI PM timer if you have it activated - I am having > > > problems with it myself but didn't have time to look closer. > > > Could you try booting with clock=tsc or clock=pit and see if it > > > fixes the touchpad. > > > > clock=tsc appears to fix the problem. > > clock=pit no change. > > So we've established that it is an interaction between the input code, > the ACPI PM time code and cpufreq, yes? That's a bit of a witches > brew. > > Does anyone know what aspect of the ACPI PM timer behaviour could cause > this? >>From my limited experience ACPI PM timer just gets the time wrong. At least psmouse times out much quicker than 4 seconds when resetting the touchpad which causes many problems. Looking at the PM timer was on my TODO list ever since it was included in -mm... I tried installing cpufreq handler to do the same adjustments for loops_per_jiffy as in timer_pit but I was still getting pretty much the same result - time goes too quickly. Dmitry