From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 18 Apr 2002 20:21:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 18 Apr 2002 20:21:31 -0400 Received: from TYO202.gate.nec.co.jp ([210.143.35.52]:42437 "EHLO TYO202.gate.nec.co.jp") by vger.kernel.org with ESMTP id ; Thu, 18 Apr 2002 20:21:29 -0400 Message-ID: <3CBF6768.8090500@tmg99.ntes.nec.co.jp> Date: Fri, 19 Apr 2002 09:40:08 +0900 From: "Adrian V. Bono" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020310 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andreas Dilger CC: linux-kernel@vger.kernel.org Subject: Re: something weird on Linux 2.4.17 on an IBM Thinkpad T20 In-Reply-To: <3CBF6225.6050605@tmg99.ntes.nec.co.jp> <20020419000928.GB28956@turbolinux.com> <3CBF6718.6010305@tmg99.ntes.nec.co.jp> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Adrian V. Bono wrote: > Andreas Dilger wrote: > >> On Apr 19, 2002 09:17 +0900, Adrian V. Bono wrote: >> >>> While working in X on kernel 2.4.17 on an IBM Thinkpad T20, sometimes >>> the mouse pointer would just gravitate all by itself, without my >>> moving the mouse or pointing stick, upwards. The first time that >>> happened, i was coding in an xterm when suddenly, window focus >>> shifted to another window and i noticed the mouse pointer was moving >>> upwards by itself. Anyone else notice this? >> >> >> >> This is common to all thinkpads (or other laptops which have trackpoint >> devices) and also happens under Windows. The cause is related to >> automatic compensation for the centering of the trackpoint. Early >> trackpoint devices didn't have automatic centering and I remember >> replacing more than a few keyboards because the mouse would start >> drifting by itself. Later trackpoints have automatic centering, but >> if you hold onto the trackpoint for a long time (causing the "center" >> to be offset by some amount) and then let go, it will settle back to >> the "old center" and the cursor will drift for a few seconds until >> the automatic centering kicks in again. >> >> Moral of the story - don't touch the trackpoint when you aren't doing >> anything with it. >> > > > Yes, i've replied two replies similar to yours. But it happens to my > desktop, too. > > oops, sorry, that should read, "i've received". :)