Re: Some sort corruption of my Thermal Subsystem after suspend to ram

[Pavel Machek <pavel@ucw.cz>]

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
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