Re: Some sort corruption of my Thermal Subsystem after suspend toram

[Pavel Machek]

Hi!

> The ICH9 apparently provides a pair of memory mapped on-die thermal sensors.
> 
> The sensors basically shut off your hardware if it gets too hot.

Are the sensors driven by ACPI? Probably yes, otherwise they would be
unable to shut down the system.

> ICH9 exports the base address for the sensors via a PCI device -- D31:F6, aka Linux 00:1f.6
> 
> I'm not aware of a native Linux device driver that talks to this device
> (nor can I think of a useful purpose for such a driver)
> So it seems what is in play here is any BIOS code that talks to this device,
> and Linux's standard PCI config space restore.
> 
> My guess is that the BIOS is enabling the device on cold boot,
> but not enabling it after resume from S3.

That sounds like a BIOS problem, right? If the piece of hardware is
driven by BIOS, Linux can't be responsible for saving/restoring it.
 									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/