From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751448AbXCTVwy (ORCPT ); Tue, 20 Mar 2007 17:52:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753915AbXCTVwy (ORCPT ); Tue, 20 Mar 2007 17:52:54 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:55153 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbXCTVwx (ORCPT ); Tue, 20 Mar 2007 17:52:53 -0400 From: "Rafael J. Wysocki" To: Pavel Machek Subject: Re: strange keyboard lag after suspend testing Date: Tue, 20 Mar 2007 22:56:04 +0100 User-Agent: KMail/1.9.5 Cc: Dmitry Torokhov , Len Brown , Andreas Mohr , vojtech@suse.cz, kernel list References: <20070320153332.GA5533@elf.ucw.cz> <20070320163113.GA5740@elf.ucw.cz> <20070320163826.GA7092@elf.ucw.cz> In-Reply-To: <20070320163826.GA7092@elf.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703202256.05628.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday, 20 March 2007 17:38, Pavel Machek wrote: > Hi! > > > > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > > >> > like someone added 50..100msec delay somewhere in keyboard > > > >> > handling. Mouse does not seem affected. /proc/interrupts seem to > > > >> > increase as they should, for both keyboard and mouse. Can someone > > > >> > reproduce it? Any ideas how to debug it? > > > >> > > > >> Probably just asking the obvious: > > > >> it's not a trivial "failed to re-configure repeat rate upon resume" > > > >> (which one could rule out by running "kbdrate" again) > > > >> but a lag in some interrupt handler or somewhere else deeper, right? > > > > > > > >No, it is not keyboard rate. Keyboard lags during normal typing, > > > >sometimes letters come in groups of two or so... > > > > > > I might start looking at embedded controller changes and switches. If > > > ACPI misbehaves that could starve keyboard controller... But you > > > said > > > > Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > > > > > that mouse is OK... Hmm, what happens if you load evbug and type while > > > watching syslog. Do you observe the same delays? > > > > Hmm, seems that it only happens in X... so maybe it is some strange > > scheduling artefact? > > > > Hmm, something is wrong here: > > > > On console, I get expected 4-5 ticks a second. In x in gnome-terminal, > > I get this: > > It gets weirder: I killed some tasks and now: (on unloaded system > running X, notice that top latency was ~1sec at 33:09). > > root@amd:~# while true ; do echo -n . ; sleep .2; date; done > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:09 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > > As soon as I load the cpu up with while1, machine starts to behave. > > When I turn on bluetooth (USB), ACPI can no longer use C3, and machine > starts to behave. Hmm? Smells like a cpufreq problem or something related. Greetings, Rafael