linux-kernel - Re: ACPI OSI disaster on latest HP laptops

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Message-id: <alpine.LFD.1.10.0808011707270.3011@localhost.localdomain>
Date:	Fri, 01 Aug 2008 17:07:48 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	Eric Piel <eric.piel@...mplin-utc.net>
Cc:	Thomas Renninger <trenn@...e.de>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-acpi <linux-acpi@...r.kernel.org>,
	"Moore, Robert" <robert.moore@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Christian Kornacker <ckornacker@...e.de>
Subject: Re: ACPI OSI disaster on latest HP laptops - critical temperature
 shutdown

[resend of a message that didn't hit the list]

On Sat, 26 Jul 2008, Len Brown wrote:

> 
> 
> On Sat, 26 Jul 2008, Eric Piel wrote:
> 
> > Just out of curiosity, let's imagine that today HP decides to fix its BIOS.
> > What would be the way to do it? Of course, without putting additional problems
> > when Windows is booted.
> 
> The should return a valid temperature from _CRT,
> and that should work everyplace without any check for OS version.
> 
> We know that this must work, because plenty of Vista compatible
> platforms do it -- such as the T61 that I'm typing on.
> 
> ie. we really don't know why HP returned _CRT=0 for vista in this BIOS,
> we just assume that it didn't cause anything bad to happen.
> 
> -Len
> 
> 
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