Re: Async resume patch (was: Re: [GIT PULL] PM updates for 2.6.33)

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On Wed, 9 Dec 2009, Mark Brown wrote:

> > How long does it take to bring down the entire embedded audio 
> > subsystem?  And how critical is the timing for typical systems?
> 
> Worst case is about a second for both resume and suspend which means two
> seconds total but it's very hardware dependant.  

A second seems awfully long.  What happens if audio isn't being played
when the suspend occurs?  Can't you shorten things with no artifacts in
that case?

If audio _is_ being played when a suspend occurs, users probably don't 
mind audible artifacts.  In fact, they probably expect some.

Alan Stern

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