From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Adachi, Kenichi" Subject: RE: Where does Dell i8200 hide it's fans? Date: Sat, 25 Jan 2003 17:22:15 +0900 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <006601c2c44a$ded48990$134425db@sayonara> References: <15921.42374.651850.622121@jena.eng.sun.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <15921.42374.651850.622121-mWDWuy/8qzhGbVqAl5zy8A@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: 'Marco Walther' , acpi-devel-pyega4qmqnRoyOMFzWx49A@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi Marco, > I've a Dell Inspiron 8200 and I know it has two fans. The > Dell-laptop driver is able to switch them but I don't see > anything in the acpi DSDT:-( Likely it's because "Dell-laptop driver" directly communicates with Thermal monitor and programs PWM FAN controller. It's not a big surprise to see that PC vendor doesn't expose FAN control to ACPI. > Another question: The Dell DSDT has some parts which work > differently for different Windows OS's. Since this laptop is > only supported with WinXP, whould it make sense to to fake > that even under Linux? If you're talking about _OSI which is defined by Microsoft and not described in ACPI spec, your attempt shouldn't make a difference in Linux. Microsoft wants to determine which version of Windows was in BIOS writer's mind when he/she wrote ACPI BIOS for the machine. By knowing the targeted Windows version, they can adjust their OS's behavior and keep the compatibility for the end user's sake. For more details, please take a glance at the following white paper: http://www.microsoft.com/hwdev/tech/onnow/_OSI-method.asp Thanks, - Adachi, Kenichi ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com