Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266650AbUJNKwY (ORCPT ); Thu, 14 Oct 2004 06:52:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266680AbUJNKwY (ORCPT ); Thu, 14 Oct 2004 06:52:24 -0400 Received: from aun.it.uu.se ([130.238.12.36]:15507 "EHLO aun.it.uu.se") by vger.kernel.org with ESMTP id S266650AbUJNKwW (ORCPT ); Thu, 14 Oct 2004 06:52:22 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16750.23132.41441.649851@alkaid.it.uu.se> Date: Thu, 14 Oct 2004 12:52:12 +0200 From: Mikael Pettersson To: "Maciej W. Rozycki" Cc: "mobil@wodkahexe.de" , linux-kernel@vger.kernel.org Subject: Re: 2.6.9-rc4 No local APIC present or hardware disabled In-Reply-To: References: <20041012195448.2eaabcea.mobil@wodkahexe.de> X-Mailer: VM 7.17 under Emacs 20.7.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1426 Lines: 32 Maciej W. Rozycki writes: > On Tue, 12 Oct 2004, mobil@wodkahexe.de wrote: > > > after upgrading to 2.6.9-rc4 I'm getting the following message in dmesg: > > > > No local APIC present or hardware disabled > > > > 2.6.9-rc3 and older kernels did not show this message. They showed: > > Local APIC disabled by BIOS -- reenabling. > > Found and enabled local APIC! > > As you've already been told, the local APIC is not being enabled by > default anymore. I think this change may be unfortunate for users, so > I've proposed the change to be applied for systems using ACPI and then > verbosely, so that the reason for the APIC being kept disabled is clear. There are systems, such as the P3-based Dell Inspirons and Latitutes that caused the dmi blacklist to be implemented, that fail whether they're using APM or ACPI. So in the interest of consistency, we should either always automatically override the BIOS, requiring "nolapic" on broken systems, or never automatically override the BIOS, requiring "lapic" on systems that work but have stupid BIOSen. None of this is ACPI-specific, so I don't like the idea of tying auto-enable/disable to ACPI. /Mikael - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/