From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nathan Bryant Subject: Re: acpi-20040715: functional regression on ASUS M2N Date: Thu, 05 Aug 2004 14:49:48 -0400 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <4112814C.2070808@optonline.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: ACPI Developers Cc: "Li, Shaohua" , "Georg C. F. Greve" List-Id: linux-acpi@vger.kernel.org Hi all. Some thoughts on this: The ELCR save/restore patch is causing regressions for some people. What if the problem is that we're saving/restoring registers at the wrong time? For example, on the Intel PIIX, the PIC is a child of PCI device 31:function 0. What if this PCI device is disabled at the time we decide to save ELCR? If the I/O space is not mapped, we would probably read 0xff in this case, I think, and I think that would set everything to level. What could be disabling it? Georg, can you add some printk's to save_ELCR and log the values that we are actually saving? Nathan ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com