Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268497AbUJJVTt (ORCPT ); Sun, 10 Oct 2004 17:19:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268502AbUJJVTt (ORCPT ); Sun, 10 Oct 2004 17:19:49 -0400 Received: from smtp2.netcabo.pt ([212.113.174.29]:23450 "EHLO smtp.netcabo.pt") by vger.kernel.org with ESMTP id S268497AbUJJVTs convert rfc822-to-8bit (ORCPT ); Sun, 10 Oct 2004 17:19:48 -0400 Subject: Re: [ACPI] Re: [BKPATCH] LAPIC fix for 2.6 From: =?ISO-8859-1?Q?S=E9rgio?= Monteiro Basto Reply-To: sergiomb@netcabo.pt To: "Maciej W. Rozycki" Cc: Linus Torvalds , Len Brown , Andrew Morton , Linux Kernel Mailing List , ACPI Developers In-Reply-To: References: <1097429707.30734.21.camel@d845pe> Content-Type: text/plain; charset=iso-8859-15 Message-Id: <1097443183.26647.31.camel@darkstar> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-7) Date: Sun, 10 Oct 2004 22:19:43 +0100 Content-Transfer-Encoding: 8BIT X-OriginalArrivalTime: 10 Oct 2004 21:19:46.0461 (UTC) FILETIME=[DE255CD0:01C4AF0E] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1332 Lines: 34 On Sun, 2004-10-10 at 20:04, Maciej W. Rozycki wrote: > On Sun, 10 Oct 2004, Linus Torvalds wrote: > > > > Hi Linus, please do a > > > > > > bk pull bk://linux-acpi.bkbits.net/26-latest-release > > > > Ok, this version of the patch suddenly looks like a real bug-fix in that > > it now makes the command line options "lapic"/"nolapic" a lot more > > logical. > > Hmm, any particular reason to keep the local APIC disabled by default? > Most BIOS vendors keep it disabled just because it's easier to get stuff > set up this way -- with the APIC enabled you need to do the same steps to > program the 8259As as with the APIC disabled, plus program the APIC > itself, which provides no gain to BIOS itself or to DOS, so why bother? > > Maciej > The problem is: trying enable some local apic's (for example on via mother boards on my laptop), cause many problem, like hang on boot (with ACPI), hang on Fn-F3 (video switch), power-off fails, etc. and no one knows how resolved the problem. So keep it disable if BIOS vendors say so, can be reasonable idea. -- S?rgio M. B. - 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/