From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750802AbVLOQbm (ORCPT ); Thu, 15 Dec 2005 11:31:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750800AbVLOQbl (ORCPT ); Thu, 15 Dec 2005 11:31:41 -0500 Received: from mail.kroah.org ([69.55.234.183]:26603 "EHLO perch.kroah.org") by vger.kernel.org with ESMTP id S1750802AbVLOQbl (ORCPT ); Thu, 15 Dec 2005 11:31:41 -0500 Date: Thu, 15 Dec 2005 08:31:22 -0800 From: Greg KH To: Denny Priebe Cc: linux-kernel@vger.kernel.org Subject: Re: Repeated USB disconnect and reconnect with Wacom Intuos3 6x11 tablet Message-ID: <20051215163122.GC14512@kroah.com> References: <20051213184600.GA4283@nostromo.dyndns.info> <20051213193832.GA14047@kroah.com> <20051215144254.GA19794@nostromo.dyndns.info> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051215144254.GA19794@nostromo.dyndns.info> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 15, 2005 at 03:42:54PM +0100, Denny Priebe wrote: > On Tue, Dec 13, 2005 at 11:38:32AM -0800, Greg KH wrote with possible deletions: > > Hello, > > > > These disconnects and reconnects disappear as soon as there's > > > a process reading either /dev/input/mouse0 or /dev/input/event5 > > > (mouse0 and event5 according to my setup). > > > Sounds like a hardware problem, the kernel can't cause a device to > > electronically disconnect itself like this. > > thanks for your reply, Greg. > > > I suggest plugging this into a different port, using a powered hub, or > > checking that the cable is still good. > > I tried what you have suggested. Unfortunately, this doesn't change > anything. > > What confuses me a bit is that theses USB disconnects do not appear > as soon as I read what the tablet provides. > > Could it be that the usb driver doesn't check for a connect status change > while there's a process reading /dev/input/{mouse,event}? so that I do not > see these disconnects while reading the tablet data? No, it's an electronic signal happening on the USB hub, the hub notifies the kernel when a disconnect happens, it has nothing to do with the driver connected to the actual device. So I really think that this is an electronic issue, sorry. Can you return this device and get a replacement one? greg k-h