From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261479AbVFMXss (ORCPT ); Mon, 13 Jun 2005 19:48:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261363AbVFMXrg (ORCPT ); Mon, 13 Jun 2005 19:47:36 -0400 Received: from smtp813.mail.sc5.yahoo.com ([66.163.170.83]:59292 "HELO smtp813.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S261500AbVFMWDT (ORCPT ); Mon, 13 Jun 2005 18:03:19 -0400 From: Dmitry Torokhov To: bhaskara Subject: Re: mouse still losing sync and thus jumping around Date: Mon, 13 Jun 2005 17:03:06 -0500 User-Agent: KMail/1.8.1 Cc: Voluspa , linux-kernel@vger.kernel.org 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: <200506131703.07315.dtor_core@ameritech.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 13 June 2005 16:59, bhaskara wrote: > > On 2005-02-23 16:53:04 Dmitry Torokhov wrote: > > > On Wed, 23 Feb 2005 17:29:49 +0100, Nils Kalchhauser wrote: > > [...] > > >> it seems to me like it is connected to disk activity... is that > > >> possible? > > > > > Yes, It usually happens either under high load, when mouse interrupts > > > are significantly delayed. Or sometimes it happen when applications > > > poll battey status and on some boxes it takes pretty long time. And > > > because it is usually the same chip that serves keyboard/mouse it > > > again delays mouse interrupts. > > > > My notebook is an Acer Aspire 1520 (1524) with a Synaptics Touchpad, > > model: 1, fw: 5.8, id: 0x9248b1, caps: 0x904713/0x4000 > > > > Kernels 2.6.11.11 and 2.6.12-rc6 > > Synaptics driver 0.14.2 > > > > The "lost sync at byte" and "driver resynched" began flooding the logs > > when I enabled Sensors --> Temperatures --> thermal_zone [THRC/THRS] in > > the system monitor gkrellm. I haven't tried battery monitoring. > > > > There are only occasional mouse pointer jumps, but the logfiles grow > > very quickly. I tried reducing the gkrellm updates from 10 times a > > second to 2, but it only had a marginal effect. It seems a bit silly > > that this powerful notebook (AMD64 Athlon 3400+) can't 'multitask' > > correctly. > > > > I thought about just erasing the warning messages from the kernel > > source (don't want to disable warn in syslog completely), but when I > > found the gkrellm culprit I turned off the monitoring instead, > > reluctantly. > > > > My system has no taxing desktop, just a window manager. > > > > I had this problem with the ps2 mouse on my desktop even under very light > load. This problem went away the very instant I started using a USB mouse. > So, I don't buy the delayed interrupts explanation. > You do not have to buy anything, you just need to read the code. pmouse driver emits this warning if delay between 2 bytes in a middle of a packet exceeds 0.5 sec. USB works slightly differently. -- Dmitry