From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik Meitner Subject: Re: DSDT Change (Compaq Presario 2100) Date: Sat, 29 May 2004 13:53:38 -0500 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: References: <200405280621.29874.andre@eisenbach.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200405280621.29874.andre-+hZUvIEKc2q1Z/+hSey0Gg@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org > As previously mentioned, my Compaq as well as many other HP model notebooks > slow down considerably when running on battery. Short off "ACPI=off" there > seemed to be no workaround. My HP nx9005 is one of them. It runs terribly slow when on battery, it is unusable really. > Well, tonight, while recompiling the DSDT a few times to remove warnings and > errors, I stumbled across this (in method SMSL > > If (0x01) > { > Store (\_SB.PCI0.ISA.EC0.TTDC, TRDC) > Store ("AC remove! Set Throttle Duty Cycle ---: ", Debug) > Store (TRDC, Debug) > Store (0x01, TREN) > } > The DSDT for my laptop has the exact same code. > In any case, I changed "If (0x01)" to "If (0x00)" and voila, I am typing this > email from KDE with the power cord unplugged - no slowdown at all. I have verified that this works for my machine also. Am I correct in assuming that TREN is "Throttle Enable"(boolean value) and TRDC is "Throttle Duty-cycle"? What other TRDC values might make sense other than 0x0 ? Erik Meitner emeitner.f2o.org/nx9005 ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click