Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937103AbXFGVm5 (ORCPT ); Thu, 7 Jun 2007 17:42:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934830AbXFGVmt (ORCPT ); Thu, 7 Jun 2007 17:42:49 -0400 Received: from ug-out-1314.google.com ([66.249.92.174]:40442 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934638AbXFGVms (ORCPT ); Thu, 7 Jun 2007 17:42:48 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=EoPdcp314kMDV250HEvSVd1apJvfSQT3/sn8ssC4QZbEV1I8ykyHOa+w/53pqPQ58jpmLlR1LbbeMV1R2IJrhO0BIXhYjzdlr1EoXZtINyt1UZxOFUDMRMT4tU3StJjy03S7mj1DRubNE7nEJTYjy36ZJEQDbRVANQkPah4faLk= Message-ID: <46687BD3.1020603@gmail.com> Date: Thu, 07 Jun 2007 23:42:43 +0200 From: Robert de Rooy User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) MIME-Version: 1.0 To: Joel.Becker@oracle.com CC: linux-kernel@vger.kernel.org, greg@kroah.com Subject: Re: ThinkPad T41 - Strange USB 2.0 behaviour References: <46686937.9050306@gmail.com> <20070607205015.GD6528@ca-server1.us.oracle.com> In-Reply-To: <20070607205015.GD6528@ca-server1.us.oracle.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2002 Lines: 42 Joel Becker wrote: > On Thu, Jun 07, 2007 at 10:23:19PM +0200, Robert de Rooy wrote: > >> On my ThinkPad T41 USB 2.0 behaves strange. Most USB 2.0 devices, refuse >> to function as such. Under Windows I get a message that I should plug >> the device into a USB 2.0 port (but it continues to function as USB >> 1.1), while under Linux I need to manually unload ehci-hcd before I can >> access the device. >> >> The strange thing is that these USB 2.0 devices used to work just fine, >> and still do on other machines. In addition I have one USB 2.0 memory >> key that still works fine (both under Windows and Linux). >> >> Now to be honest, I think this is a hardware problem, as I have had >> another T41p before that also suddenly no longer liked USB 2.0 devices, >> and if you search with Google you find other ThinkPad T41 users >> complaining about similar behaviour. >> > > Hardware problem. You need a new system board. I had this > problem on my T41, devices would sometimes work, sometimes not > (depending on the reboot). If I plugged in a USB 1.1 hub, then pluged > the memory reader into the hub, it would always work at 1.1 speeds. > New system board, USB 2.0 works just fine. > > Joel > Yes I figured it was a hardware problem, but that was not really the point I was trying to raise ;). I would like, if possible for Linux to automatically fallback to USB 1.1 like Windows does (preferably with a suitable warning). Regarding getting the systemboard replaced, this machine is already scheduled for replacement, and I should be getting a new one in the next few weeks. But other users apparently have been having similar problems, and might not want to get the (presumably out-of-warranty) systemboard replaced. - 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/