Message-ID: <4B45001E.7000404@zytor.com>
Date: Wed, 06 Jan 2010 13:26:54 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Len Brown <lenb@kernel.org>
CC: Matthew Garrett <mjg59@srcf.ucam.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Christian Hofstaedtler <ch@zeha.at>, x86@kernel.org,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       bruce.w.allan@intel.com, Thomas Gleixner <tglx@linutronix.de>,
       Justin Piszcz <jpiszcz@lucidpixels.com>, linux-acpi@vger.kernel.org,
       Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Subject: Re: [PATCH] Add DMI quirk for Intel DP55KG mainboard
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On 01/06/2010 12:22 PM, Len Brown wrote:
>>
>> It's effectively guaranteed if the system is validated with Windows.
> 
> today's common industry practice != future guarantee
> 
> We can't rely on blind use of _OSI to mean "new enough", since
> it was supported back in W2K era.  That means we have to parse
> the OSI strings.  But what happens when a BIOS writer decides to
> evaluate _OSI("Windows Future") without evaluating any of the
> old strings we know about?  We would disable ACPI reset on such
> a future box?
> 

What about using _OSI() with a *blacklist*, i.e. treat _OSI("Unknown
String") as "new enough", whereas _OSI("Windows 2000") is ignored?

	-hpa

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