From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 7 Mar 2003 17:19:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 7 Mar 2003 17:19:25 -0500 Received: from pc2-cwma1-4-cust86.swan.cable.ntl.com ([213.105.254.86]:37807 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Fri, 7 Mar 2003 17:19:24 -0500 Subject: Re: Interrupt problem, no USB on SMP machine with 2.4.19/20/21 From: Alan Cox To: Greg KH Cc: Ed Wildgoose , Linux Kernel Mailing List In-Reply-To: <20030307221343.GC21315@kroah.com> References: <3E68F616.3090602@Wildgooses.com> <20030307221343.GC21315@kroah.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Message-Id: <1047080149.23803.25.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.1 (1.2.1-4) Date: 07 Mar 2003 23:35:50 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2003-03-07 at 22:13, Greg KH wrote: > Have you booted with "noapic" on the command line? That's the only way > a lot of VIA motherboards will get their onboard USB controller to work > properly. VIA onboard devices require the interrupt line and pin are both written in APIC mode. Linux for reasons I still don't understand does not do that by default. The current -ac tree has a quirk for this although it doesnt seem to be working for all cases and needs a victim to review it more carefully