Re: An embedded-Linux power-management framework

[Johnathan Hicks <thetech-Pn2JTpibVOrk1uMJSBkQmQ@public.gmane.org>]

Alan Cox wrote:
> It may make sense on a box with ACPI, but most boxes that are heavily
> STPCLK managed are older. The Athlon one seems to be less interesting
> than the others (btw - seems you can mix stpclk with the other features
> you just have to turn stpclk back off before idling)

Ah yes, I had forgotten about the older hardware, but I thought all they had 
was HLT. About the Athlon case, STPCLK is used for all the power management 
that I can think of except HLT. Feel free to correct me here if I'm wrong.

> On a K5/K6/486/.. STPCLK is basically your entire power management
> barring what lurks on the PCI devices - which can save a suprising
> amount of power too. I've been playing (not very successfully at the
> moment) at dropping my video card into D3 when screenblanking

What kind of delay would that cause when restoring the state of the card? I 
would hope not that great of a delay as this kind of action is one that should 
be expected.

--John




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