From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750896AbVH2F24 (ORCPT ); Mon, 29 Aug 2005 01:28:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750881AbVH2F24 (ORCPT ); Mon, 29 Aug 2005 01:28:56 -0400 Received: from outmx003.isp.belgacom.be ([195.238.2.100]:9668 "EHLO outmx003.isp.belgacom.be") by vger.kernel.org with ESMTP id S1750806AbVH2F2z (ORCPT ); Mon, 29 Aug 2005 01:28:55 -0400 From: Jan De Luyck To: linux-kernel@vger.kernel.org Subject: Re: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+ Date: Mon, 29 Aug 2005 07:28:06 +0200 User-Agent: KMail/1.8.1 Cc: James Courtier-Dutton , Dominik Wezel References: <43106DEF.3040206@qwasartech.com> <431245E2.5010308@superbug.demon.co.uk> In-Reply-To: <431245E2.5010308@superbug.demon.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200508290728.07102.lkml@kcore.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 29 August 2005 01:16, James Courtier-Dutton wrote: > 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. This seems to be in contrast with what hotplug does automatically: it loads both ehci_hcd and uhci_hcd here. If I don't load uhci_hcd, lo-speed devices do not work. Jan -- A grammarian's life is always in tense.