From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Lindroth Subject: Re: Problem: ACPI related soft lockup on Fujitsu-Siemens AMILO Si 2636 Date: Wed, 08 Oct 2008 12:48:36 +0200 Message-ID: <48EC9004.6010105@gmail.com> References: <48E9F51A.4080107@gmail.com> <48EC5F4B.8020009@gmail.com> <48EC6465.8060200@gmail.com> <48EC7430.1010001@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from nf-out-0910.google.com ([64.233.182.188]:30575 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753764AbYJHKsm (ORCPT ); Wed, 8 Oct 2008 06:48:42 -0400 Received: by nf-out-0910.google.com with SMTP id d3so1527040nfc.21 for ; Wed, 08 Oct 2008 03:48:40 -0700 (PDT) In-Reply-To: <48EC7430.1010001@gmail.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Alexey Starikovskiy Cc: linux-acpi@vger.kernel.org Alexey Starikovskiy wrote: > Alexey Starikovskiy wrote: >> This is AML implementation of EC driver... it relies on certain speed >> of AML interpreter to work properly (look for Noop inserted as delay). >> >> It is possible to replace this driver with the native Linux one, which >> might be >> more robust, but this involves heavy DSDT hacking. >> >> Overall, it is heavily mis-designed BIOS, so don't expect it to be >> fixed on Linux side. >> >> Regards, >> Alex. > Please check if making Noop a small delay helps I've tried the patch with an udelay of 100 but it did not make any difference. I've also tried raising it to 200 but that created an unbootable system because one of the ACPI init methods failed. You are right, this is a really broken BIOS. I find it odd that only I experience this problem. According to one site this laptop is the 7:th most popular laptop right now so someone else should have reported something. /Thomas Lindroth