From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264922AbTLWDi1 (ORCPT ); Mon, 22 Dec 2003 22:38:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264948AbTLWDi1 (ORCPT ); Mon, 22 Dec 2003 22:38:27 -0500 Received: from smtp811.mail.sc5.yahoo.com ([66.163.170.81]:17530 "HELO smtp811.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S264922AbTLWDi0 (ORCPT ); Mon, 22 Dec 2003 22:38:26 -0500 From: Dmitry Torokhov To: Thomas Molina , Kernel Mailing List Subject: Re: synaptics mouse jitter in 2.6.0 Date: Mon, 22 Dec 2003 22:38:17 -0500 User-Agent: KMail/1.5.4 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200312222238.17076.dtor_core@ameritech.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 22 December 2003 09:40 pm, Thomas Molina wrote: > I am running Fedora Core 1 updated on a Presario 12XL325 laptop. For a > long time during the 2.5 series I couldn't use the synaptics support. > As a result, I haven't tested this for some time. I just compiled a > fresh 2.6.0 tree, included synaptics support and now I am getting mouse > jitter. > > The easiest way to see this is to open Mozilla and go to a page with a > lot of text links such as a news site with links to a number of > stories. With synaptics support compiled in I get side to side jitter > when moving the mouse over a link. It looks as if my finger has a > nervous twitch in it. Then, when I take my finger off the touchpad to > click on the link, the mouse cursor jumps about an eighth of an inch in > a random direction. It is very annoying since the jump takes it off > the link and I can't click on it. > > Compiling synaptics support out gets me back to a stable mouse cursor. Right, I think I see it. The mousedev module does not do any smoothing of the reported coordinates which would cause the jitter you are seeing. Normally drivers do 3- or 4-point average. I'll cook up something to fix it. Meanwhile could you give a try Peter Osterlund XFree86 Synaptics driver: http://w1.894.telia.com/~u89404340/touchpad/index.html Dmitry