From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269030AbTGUA7H (ORCPT ); Sun, 20 Jul 2003 20:59:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269124AbTGUA7H (ORCPT ); Sun, 20 Jul 2003 20:59:07 -0400 Received: from meryl.it.uu.se ([130.238.12.42]:14052 "EHLO meryl.it.uu.se") by vger.kernel.org with ESMTP id S269030AbTGUA7F (ORCPT ); Sun, 20 Jul 2003 20:59:05 -0400 Date: Mon, 21 Jul 2003 03:13:52 +0200 (MEST) Message-Id: <200307210113.h6L1DqiY018985@harpo.it.uu.se> From: Mikael Pettersson To: linux-kernel@vger.kernel.org, rl@hellgate.ch Subject: Re: APIC support prevents power off Cc: mingo@redhat.com Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 20 Jul 2003 16:36:13 +0200, Roger Luethi wrote: >On some UP boards (e.g. ASUS A7A266) enabling support for local APICs keeps >the machine from powering off on shutdown. It will just hang instead. > >This has been observed by others before [1]. A warning in the respective >configuration note seems in order (or a proper fix if anybody has one). > >Roger > >[1] http://marc.theaimsgroup.com/?l=linux-kernel&m=105561164424871&w=2 Insufficient data to draw anti-local-APIC conclusions. - ensure you have the latest BIOS - if you're using APM, ensure that CPU_IDLE and DISPLAY_BLANK are disabled, and that APM isn't built as a module (these things are known to cause APM hangs in UP APIC systems) - if you're using ACPI, try without ACPI, or at least with ACPI not doing any power management A very general "may break some BIOSen" warning could be in order. /Mikael