From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nate Lawson Subject: Re: Source of buzzing determined for hp tc1100 Date: Mon, 06 Dec 2004 15:28:23 -0800 Message-ID: <41B4EB17.5010702@root.org> References: <41B4E721.1040601@joshuawise.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <41B4E721.1040601-NtISFavHD68j5TC/SZClsA@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Joshua Wise Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Joshua Wise wrote: > Hi all, > > Okay, so I have determined the source of the buzzing for the hp tc1100, > and I have a list of conditions to be met for the buzzing to show up. I > determined the following mostly by observation. To determine which ACPI > modules were causing issues, I whipped up a GOK keyboard to use pen > input to determine the problem-causer. I will make that keyboard > available on request. > > So, without further ado, here are the conditions to be met: > * The system must be idle/ > * The system must be undocked from the USB keyboard base. > * The system must be unplugged from 18VDC power. > * The processor module must be loaded. > > If all of the above conditions are met, the system will emit a buzzing > from the CPU fan area. (Sometimes the system must be throttled above 75% > for the buzzing to occur.) > > Has anyone any insight? This is a faq, the answer is C3. -- Nate ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/