Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752196AbXLZFN2 (ORCPT ); Wed, 26 Dec 2007 00:13:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751530AbXLZFNW (ORCPT ); Wed, 26 Dec 2007 00:13:22 -0500 Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:55532 "EHLO pd2mo3so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751219AbXLZFNV (ORCPT ); Wed, 26 Dec 2007 00:13:21 -0500 Date: Tue, 25 Dec 2007 23:13:16 -0600 From: Robert Hancock Subject: Re: x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM In-reply-to: To: Linus Torvalds Cc: "Rafael J. Wysocki" , Carlos Corbacho , pm list , "H. Peter Anvin" , Linux Kernel Mailing List , Greg KH , Ingo Molnar , Thomas Gleixner , Len Brown , Andrew Morton Message-id: <4771E2EC.7020407@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: <200712251312.43478.carlos@strangeworlds.co.uk> <47713B2B.3000105@shaw.ca> <200712251926.51628.rjw@sisk.pl> User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1454 Lines: 34 Linus Torvalds wrote: >> IMO, we should check which version of the specification we're supposed to >> follow, on the basis of FADT contents, for example, and follow this one. > > No, we should try to figure out what Windows does. *If* windows checks the > version, we should do that too. But we should absolutely *not* just assume > that the documentation is an accurate picture of reality. > > Does anybody know how we could find out? > > Linus > Well, it seems that if one had a checked (debug) build of Windows (or at least the acpi.sys driver) installed, as well as a copy of the Microsoft ASL compiler, they could compile and temporarily override the DSDT with a hacked one that would output what the device power states were in some fashion (maybe through the kernel debugger). Some info about this here: http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295b40c8/TW04015_WINHEC2004.ppt I suspect that might require more Windows hacking skill and/or motivation than one might be likely to find on this list, though :-) -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/