From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Dunn Subject: Re: Boot fails on Thinkpad L420 without ACPI=off or nosmp Date: Tue, 08 Nov 2011 23:12:19 +1300 Message-ID: <1496066.Ip6pz3h4UQ@linux-9am5.site> References: <7377461.xUP08Ft1Zz@linux-9am5.site> <4EB822DB.2030808@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mail-gy0-f174.google.com ([209.85.160.174]:39898 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750878Ab1KHKM0 (ORCPT ); Tue, 8 Nov 2011 05:12:26 -0500 Received: by gyc15 with SMTP id 15so366662gyc.19 for ; Tue, 08 Nov 2011 02:12:25 -0800 (PST) In-Reply-To: <4EB822DB.2030808@kernel.org> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Len Brown Cc: linux-acpi@vger.kernel.org Hi Len, thanks so much for your reply. In response I can report: 1. System boots fine using noapic option. 2. System fails to boot normally using Fedora with kernel 2.6.38 Thanks Regards Steve On Mon, 07 Nov 2011 13:26:35 Len Brown wrote: > Hi Steve, > > Thanks for the report. > > > OS Information > > OS: Linux 3.1.0-rc9-1-desktop x86_64 > > System: openSUSE 12.1 RC 1 (x86_64) > > KDE: 4.7.2 (4.7.2) > > > > Hardware Information > > Lenovo Thinkpad L420 Model number 78544KM > > i5-2520M(2.50GHz) > > Intel HD Graphics > > > > Problem > > Fails to boot without boot option of either acpi=off, nosmp, or > > maxcpus=0 > > How about simply "noapic" > > or if that fails, then: > > maxcpus=1, noapic > > That should get you up in ACPI mode, but w/ the IOAPIC disabled. > > > Almost immediately freezes. CapsLock does not work and only way to > > continue is to power off with the power button. > > > > With debug on last line of output reads: > > ACPI: CE: Look up EC in DSDT > > > > Fails with kernel 3.04 and 3.1 and all distro's I have tried with. > > have you tried any distros that are running a kernel older than 3.04? > > thanks, > -Len