Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967955AbXFHKJr (ORCPT ); Fri, 8 Jun 2007 06:09:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S967368AbXFHKJj (ORCPT ); Fri, 8 Jun 2007 06:09:39 -0400 Received: from ug-out-1314.google.com ([66.249.92.174]:21821 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967034AbXFHKJi (ORCPT ); Fri, 8 Jun 2007 06:09:38 -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=kxpE9f2f/80HckF/bpRChkyMsidL20/VJZ9UryH12SYCvq28Gvf1EIDJKLHoAT/yyf3sPgw/9h0htmPLEnPLCoEGzR34x7gwoQKS90aL1WesJY0xMJhU5pPIywWb3MExcIcXdpho0jTcw5I344c1ErnWveK1WUrDXlRkvFDFjqw= Message-ID: <46692ADC.4050604@gmail.com> Date: Fri, 08 Jun 2007 12:09:32 +0200 From: Robert de Rooy User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) MIME-Version: 1.0 To: Jiri Kosina CC: Joel.Becker@oracle.com, 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> <46687BD3.1020603@gmail.com> In-Reply-To: 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: 1201 Lines: 29 Jiri Kosina wrote: > On Thu, 7 Jun 2007, Robert de Rooy wrote: > > >> 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). >> > > What do you propose as a trigger for the kernel to fallback? > > You can work it around manually, just don't use ehci-hcd, can't you? > > Yes I can unload ehci-hcd, but I have one USB 2.0 device that strangely enough DOES work as such, and unloading ehci-hcd will cause that also to run at 1.1 speed. Clearly something is failing when plugging a device with ehci-hcd loaded, the driver seems to keep retrying indefinitely. Instead it would be nice if after a few tries it hands the device over to uhci-hcd. This seems to be the behaviour under Windows, so I was wondering if Linux could be made to do something similar. - 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/