From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Eisenbach Subject: Re: Re: DSDT Change (Compaq Presario 2100) Date: Fri, 02 Jul 2004 10:33:24 -0700 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <40E59C64.9050603@eisenbach.com> References: <200405280621.29874.andre@eisenbach.com> <200405291345.51712.andre@eisenbach.com> <20040628213409.GA19468@elf.ucw.cz> <20040702115454.GA12889@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20040702115454.GA12889-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Pavel Machek Cc: Erik Meitner , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Pavel Machek wrote: >>>Try your machine on battery, with full load. Monitor battery >>>temperature. If it gets hot, your battery was not really designed for >>>this, and forget this... >>> Pavel >>> >>> Thanks for the heads up on this, Pavel! I did unplug my batter, started an updatedb and compiled firefox, coreutils and a new kernel. The battery got warm, but not hot. Definitely not more then when charging it. A curious (unrelated) observation: The ACPI thermal zone temperature indicated about 68 C at most on battery doing this. However, when the battery was drained and I plugged the AC back in, the temperature rose and stayed at about 75 C and the fans worked audibly harder. This continued even after I removed the battery, so it's not the additional heat from the charging. I wonder if something else is throttled when on battery. It's not the CPU though as benchmarks dont slow down on battery anymore after my DSDT change. As far as the DSDT change goes. Pavel, do you think that the kind of throtteling they do is an effective way to limit battery current draw? I am getting more battery life now - even with powernow at "performance". Cheers. Andre ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com