From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933509AbXCEPHF (ORCPT ); Mon, 5 Mar 2007 10:07:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933507AbXCEPHF (ORCPT ); Mon, 5 Mar 2007 10:07:05 -0500 Received: from mxout-03.mxes.net ([216.86.168.178]:1557 "EHLO mxout-03.mxes.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933509AbXCEPHD (ORCPT ); Mon, 5 Mar 2007 10:07:03 -0500 Message-ID: <34036.86.7.220.119.1173107218.squirrel@wmbeta.mxes.net> In-Reply-To: <1173090919.6782.13.camel@daplas> References: <20070305015039.GI3441@stusta.de> <1173090919.6782.13.camel@daplas> Date: Mon, 5 Mar 2007 15:06:58 -0000 (GMT) Subject: Re: [4/6] 2.6.21-rc2: known regressions From: "Andrew" To: "Antonino A. Daplas" Cc: linux-kernel@vger.kernel.org Reply-To: "Andrew" User-Agent: SquirrelMail/1.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, March 5, 2007 10:35 am, Antonino A. Daplas wrote: > > This is not a framebuffer nor console problem. > > > I think Andrew Nelless confirmed that the cause is from the above > commit. How to fix it, I don't know. Perhaps the acpi_skip_timer_override boot option has to > be used. > > Tony > Yes, apologies for taking so long with this. I tried the acpi_skip_timer_override boot option last night, after Tony pointed it out, and this also works around the problem. To summarize the cause is the changes made to early-quirks.c in the mentioned commit and when this is reverted the problem goes away. There doesn't seem to be any sign of a living HPET on this board or any way of enabling it in the current BIOS revision but it seems on intermittent boots the check in early-quirks.c returns, the timer override doesn't happen, and the kernel fails to boot properly. Btw, this is the Asus A8N-VM *CSM* main board, the non-CSM variety actually has a nForce 410 rather than an nForce 430 chip. I don't know whether they behave any differently but the two boards actually have different BIOS releases. If reverting the commit would disable the HPET on boards that do actually support it I personally don't mind using the acpi_skip_timer_override workaround. - Andrew