From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751073AbXCTQig (ORCPT ); Tue, 20 Mar 2007 12:38:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751408AbXCTQig (ORCPT ); Tue, 20 Mar 2007 12:38:36 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:40548 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751073AbXCTQif (ORCPT ); Tue, 20 Mar 2007 12:38:35 -0400 Date: Tue, 20 Mar 2007 17:38:26 +0100 From: Pavel Machek To: Dmitry Torokhov , Len Brown Cc: Andreas Mohr , vojtech@suse.cz, kernel list Subject: Re: strange keyboard lag after suspend testing Message-ID: <20070320163826.GA7092@elf.ucw.cz> References: <20070320153332.GA5533@elf.ucw.cz> <20070320160006.GA14843@rhlx01.hs-esslingen.de> <20070320160338.GC5533@elf.ucw.cz> <20070320163113.GA5740@elf.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070320163113.GA5740@elf.ucw.cz> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html