From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Dunn Subject: Boot fails on Thinkpad L420 without ACPI=off or nosmp Date: Wed, 02 Nov 2011 12:12:29 +1300 Message-ID: <7377461.xUP08Ft1Zz@linux-9am5.site> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mail-yw0-f46.google.com ([209.85.213.46]:47907 "EHLO mail-yw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755056Ab1KAXMb (ORCPT ); Tue, 1 Nov 2011 19:12:31 -0400 Received: by ywf7 with SMTP id 7so2737818ywf.19 for ; Tue, 01 Nov 2011 16:12:30 -0700 (PDT) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hello all 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 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. Boots no problem with 32bit and with Windows 7 acpidump https://docs.google.com/open?id=0B2IDfK0E8tJkMDFlYjM4MTEtNmM1Ni00ZGFkLTg2MzQtYTM2YTIyOWYzYmVm Please let me know what other information I should provide. Thank you Regards Steve