From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 24 Sep 2001 14:40:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 24 Sep 2001 14:40:00 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:60516 "EHLO flinx.biederman.org") by vger.kernel.org with ESMTP id ; Mon, 24 Sep 2001 14:39:50 -0400 To: Alan Cox Cc: matthias.andree@stud.uni-dortmund.de (Matthias Andree), linux-kernel@vger.kernel.org (Linux-Kernel mailing list), mingo@redhat.com Subject: Re: 2.4.10-pre15 -> final breaks IOAPIC on UP? In-Reply-To: From: ebiederm@xmission.com (Eric W. Biederman) Date: 24 Sep 2001 12:30:56 -0600 In-Reply-To: Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.5 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alan Cox writes: > > So, I believe that any IOAPIC related change between 2.4.10-pre15 and > > 2.4.10-final breaks my X11 here. > > Uniprocessor IO-APIC only works for some machines. It also subtly changes > IRQ delivery timing properties which may be worth checking too All athlon motherboards with the via686 southbridge and an AMD northbridge should fail according to the AMD errata. This may also happen with a via northbridge. The AMD apic bus is subtely different from the intel apic bus in implementation. Eric