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Date: Tue, 25 Dec 2007 23:13:16 -0600 From: Robert Hancock <hancockr@...w.ca> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: "Rafael J. Wysocki" <rjw@...k.pl>, Carlos Corbacho <carlos@...angeworlds.co.uk>, pm list <linux-pm@...ts.linux-foundation.org>, "H. Peter Anvin" <hpa@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Greg KH <gregkh@...e.de>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, Len Brown <lenb@...nel.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM 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@...pamshaw.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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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