From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: About p4-clockmod breakage/removal Date: Tue, 13 May 2008 20:48:00 -0400 Message-ID: <200805132048.00653.lenb@kernel.org> References: <48246C3E.7010608@ceibo.fiec.espol.edu.ec> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from hera.kernel.org ([140.211.167.34]:35270 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756807AbYENAyd convert rfc822-to-8bit (ORCPT ); Tue, 13 May 2008 20:54:33 -0400 In-Reply-To: <48246C3E.7010608@ceibo.fiec.espol.edu.ec> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: cpufreq@lists.linux.org.uk Cc: Alex =?iso-8859-1?q?Villac=ED=ADs_Lasso?= , linux-acpi@vger.kernel.org On Friday 09 May 2008, Alex Villac=ED=ADs Lasso wrote: > In a somewhat old computer I use at home, I have a Pentium 4 CPU runn= ing=20 > at 1.7GHz. On this computer, acpi-cpufreq does not work (modprobe fai= ls=20 > with -ENODEV), only p4-clockmod. Lately this means I have to compile = my=20 > own kernel to get speed throttling on my computer. >=20 > Recently, patch ed9cbcd40004904dbe61ccc16d6106a7de38c998 (Revert=20 > "speedstep-lib.c: fix frequency multiplier for Pentium4 models 0&1")=20 > broke clock speed reporting. It now reports I have a max speed of 13.= 80=20 > GHz instead of 1.7GHz. I only wish my CPU were that fast... Reverting= =20 > this patch fixes the problem for me. However, since I suscribed=20 > yesterday to this list, I see talk about removing p4-clockmod altoget= her=20 > from the tree. Maybe my real problem is that acpi-cpufreq does not wo= rk=20 > even though it should, but I have yet to find a way to make the modul= e=20 > print the information that is supposed to be displayed through dprint= k()=20 > messages. What else can I do to debug acpi-cpufreq on my machine? Assuming this is a laptop with a batter, I'd certainly be interested if you could run BLTK and measure any benefit to p4-clockmod (I've never been able to) http://www.lesswatts.org/projects/bltk/ Re: acpi-cpufreq Verify that you're running the latest BIOS, and look in BIOS SETUP for any options related to CPU power management, Speed Step, EIST, P-states etc, and enable if present. If that doesn't do it, then open a bug here complaining that acpi-cpufreq doesn't load: http://bugzilla.kernel.org/enter_bug.cgi?product=3DACPI and attach the output from acpidump -- which will tell us if the underlying BIOS support is present. My guess is that it is not. -Len -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html