From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Lawrence Subject: Re: Toshiba Dynabook S7 ACPI problems Date: 22 Jul 2003 22:06:18 -0400 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1058925977.1255.7.camel@satellite> References: Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: Jan Rychter Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Sun, 2003-07-13 at 13:58, Jan Rychter wrote: > 4. I don't know if this is ACPI's fault, but it seems all devices want to > sit on the same IRQ: > > ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 *11) > ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 *11) This is common on systems that are (mostly) legacy-free like my Toshiba laptop; the ACPI IRQ balancing code tries to avoid putting PCI interrupts on lines that legacy ISA devices use. If you modify drivers/acpi/pci_link.c (look for the "penalty" table) you can make the IRQ allocation saner (there probably ought to be a kernel argument to adjust the penalty table, or at least something that will de-penalize legacy system IRQs). Chris -- Chris Lawrence Department of Physics and Astronomy, University of Mississippi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0