Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992711AbWJTTOE (ORCPT ); Fri, 20 Oct 2006 15:14:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992712AbWJTTOE (ORCPT ); Fri, 20 Oct 2006 15:14:04 -0400 Received: from nf-out-0910.google.com ([64.233.182.187]:18562 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S2992711AbWJTTOB (ORCPT ); Fri, 20 Oct 2006 15:14:01 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=IpGSdN5p8vQGjilBEwf7lhLbwfHGDAcP7OYWvFmiMFNqOci3mRBNviujQV9BmEEOYjhca9it6yofFBHTIQIb3KDW5m8hf8ZeUrJGnO+7ZVkUxMnBtTWniXJZOjmenCZma7DsnL0jK7w6ZQRgp7IWItymj6OhGwToLRmWXMuyruI= Message-ID: Date: Fri, 20 Oct 2006 15:13:59 -0400 From: "Dmitry Torokhov" To: "Andrew Morton" Subject: Re: various laptop nagles - any suggestions? (note: 2.6.19-rc2-mm1 but applies to multiple kernels) Cc: teunis , linux-kernel@vger.kernel.org, "Ingo Molnar" , "Thomas Gleixner" In-Reply-To: <20061020110746.0db17489.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4537A25D.6070205@wintersgift.com> <20061019194157.1ed094b9.akpm@osdl.org> <4538F9AD.8000806@wintersgift.com> <20061020110746.0db17489.akpm@osdl.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1925 Lines: 48 On 10/20/06, Andrew Morton wrote: > On Fri, 20 Oct 2006 09:30:37 -0700 > teunis wrote: > > > > > Please don't play with the Cc:s! Just do reply-to-all, thanks. > > > Andrew Morton wrote: > > > On Thu, 19 Oct 2006 09:05:49 -0700 > > > teunis wrote: > > > > > >> -----BEGIN PGP SIGNED MESSAGE----- > > >> Hash: SHA1 > > >> > > >> Setting the internal clock to 100 Hz stablizes the laptop - and the > > >> synaptics touchpad stops "crashing" (when "crashed" the pad reads out > > >> all kinds of seemingly random values). I would suspect the driver > > >> needs adjusting for the variable clock. Also - it's definitely nicer > > >> on the laptop power use as far as I can tell - should this be in the > > >> documentation? > > > > > > So you're saying that CONFIG_NO_HZ breaks the touchpad? > > > > yes. At least for Acer Travelmate 8000 and HP nx6310 and HP nx7400. > > Other than the touchpad - there is not a lot of common hardware between > > these units. The readout becomes highly unreliable. (in X it starts > > jumping around - it SORT OF resembles the output) > > > > My suspicion is a timing problem in the synaptic USB driver > > OK, that's going to be hard to fix and it'd be awkward (and unpopular) to > make inclusion of the dynamic-ticks feature dependent on fixing this. > (Then again, it'd get Ingo into device drivers ;)) > I wonder if the problem is with the in-kernel synaptics driver or with X (itself or synaptics driver in it). Does the touchpad misbehaves when you using GPM on text console? What about when you using legacy mouse driver (as opposed to synaptics) in X? -- Dmitry - 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/