[linux-pm] [RFC][PATCH 00/11] Android PM extensions

[Uli Luckas]

On Sunday, 1. February 2009, Alan Stern wrote:
> Early-suspend seems to be a completely different matter.  In fact it
> isn't a suspend state at all, as far as I understand it.  It's more
> like what you get simply by doing a runtime suspend on some collection
> of devices.  I don't see that the kernel needs to treat it as a special
> state, and in might be possible to have a user program manage the whole
> thing -- provided the drivers in question implement runtime power
> management (as USB has done).
>
> Alan Stern

Except you always want early-suspend and auto-suspend at the same time. The 
idea is, if all display of system states is off (early-suspend), we can 
enable or disable the cpu at will (auto-suspend) because nobody will notice. 

Uli


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