Re: Wakeup settings for USB hubs?

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On Thu, 5 Jul 2007, Oliver Neukum wrote:

> Am Donnerstag, 5. Juli 2007 schrieb Alan Stern:
> > Allow me to rephrase.  You seem to be saying that /sys/.../power/wakeup 
> > should be able to hold four different values:
> > 
> >         1. always disabled
> >         2. always enabled
> >         3. enabled at runtime but not during system sleep
> >         4. enabled during system sleep but not at runtime
> > 
> > Right?  With the default being 3 (except for a few things like the 
> > power button).
> > 
> > Or maybe there should be two attribute files: wakeup (used during
> > system sleep) and wakeup_runtime (used for runtime suspend).
> > 
> > Comments from anybody else?
> 
> I am not sure we ever want to do runtime suspend without remote wakeup.

You mean the user shouldn't be able to disable remote wakeup during a
runtime suspend?  But what if the user wants to put the device to sleep
with no possibility of wakeup?

> If we want that then it is orthogonal to its value during system sleep.
> That would call for two attributes.

Another attribute can be added easily enough.

Dave, you created the original wakeup attribute.  What do you think 
about adding a separate wakeup_runtime?  (At a minimum, perhaps you can 
suggest a better name!)

Alan Stern

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