linux-kernel - Re: Useless thermal acpi driver ?

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Date:	Wed, 16 Dec 2009 00:21:39 -0500 (EST)
From:	Len Brown <lenb@...nel.org>
To:	J.A. Magallón <jamagallon@....com>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org
Subject: Re: Useless thermal acpi driver ?

On Tue, 15 Dec 2009, J.A. Magallón wrote:

> On Mon, 14 Dec 2009 22:00:25 -0500 (EST), Len Brown <lenb@...nel.org> wrote:
> 
> > this DSDT returns a constant temperature, always:
> > 
> >             Method (_TMP, 0, NotSerialized)
> >             {
> >                 Return (0x0BB8)
> >             }
> > 
> > 
> > so in this case, Linux is just reporting the (lack of) news:-)
> > 
> 
> So, lets see...:
> 
> - Someone decided ACPI is the only-real-good-way
> - Only a few devices are ported to ACPI
> - The old way is unusable
> - We can not return to the old way
> 
> So, any solution ? Thermal ACPI info in this boards (and I suspect in many
> others) is useless. We can not disable that part of ACPI, we can not enable
> sensors. So no thermal monitoring.
> Nice.
> 
> Ayways, as in this case the ACPI part does not any real work, is still
> present the problem of two drivers poking the same hardware or could I use
> that 'lax' trick ?
> 
> And second, can the traditional sensor drivers be ported to offer an ACPI
> device replacing the default one, or is that a stupid question ?
> 

Check, for an updated BIOS from the vendor.
If there is none, then express your displeasure to the vendor
and consider a different one for your next purchase.

For the box you have, try "acpi_enforce_resources=lax"
and load your native sensor driver.
Likely you'll be happy with that -- I just can't guarantee it.

cheers,
-Len Brown, Intel Open Source Technology Center