From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750929AbVH1XQw (ORCPT ); Sun, 28 Aug 2005 19:16:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750933AbVH1XQw (ORCPT ); Sun, 28 Aug 2005 19:16:52 -0400 Received: from anchor-post-34.mail.demon.net ([194.217.242.92]:36366 "EHLO anchor-post-34.mail.demon.net") by vger.kernel.org with ESMTP id S1750925AbVH1XQv (ORCPT ); Sun, 28 Aug 2005 19:16:51 -0400 Message-ID: <431245E2.5010308@superbug.demon.co.uk> Date: Mon, 29 Aug 2005 00:16:50 +0100 From: James Courtier-Dutton User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050804) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Dominik Wezel CC: linux-kernel@vger.kernel.org Subject: Re: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+ References: <43106DEF.3040206@qwasartech.com> In-Reply-To: <43106DEF.3040206@qwasartech.com> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dominik Wezel wrote: > Problem > ======= > When turning on the laptop and during POST and GrUB loading, all ports > on the hub are enabled. During the USB initialization phase, when the > hub is detected, shortly all ports become disabled, then turn on again > (uhci_hcd detects the lo-speed ports). Upon initialization of ehci_hcd > however, the ports are disconnected again (for good): > Use uhci_hcd or ehci_hcd, but never both at the same time. ehci_hcd will work with all lo-speed ports, so uhci_hcd is then no needed. James