RE: [PATCH] amd76x_pm: C3 powersaving for AMD K7

[Erik Slagter <erik@slagter.name>]

On Thu, 2006-02-02 at 01:50 +0000, Alan Cox wrote:
> On Mer, 2006-02-01 at 20:35 -0500, Brown, Len wrote:
> > This endeavor is full of risk, and I would be extremely careful
> > about enabling features that the BIOS explicitly disabled --
> > unless the hardware manufacturer publicly publishes
> > support for the feature, or the errata that you're working around.
> 
> Folks had code that supported AMD76x by banging the hardware directly.
> On some AMD76x systems it caused corruption. Nobody AFAIK ever figured
> out if it was an errata (nothing obvious in the docs/errata list) or a
> bug in the code doing the banging on the chip or some other bit of
> hardware on the mainboard that needed extra handling.

Looks like it would be beneficial if someone, preferably with some
authority ;-), would try to get Tyan and/or AMD to reveal this
information.

I have read the docs for the AMD768 chipset numerous times, but I least
I (okay okay, I am not the expert here ;-)) cannot find anything that
would prevent this from working correctly.

AFAIK Tyan has been more or less cooperative with linux developers in
the past?! I'd be more than happy to ask them, but I don't think they
will take me very serious

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