On Monday 16 October 2006 8:04 am, Alan Stern wrote:

> > > > Do you have mice that do not require button push to wake up?
> > > 
> > > It doesn't matter.  The mouse descriptors don't specify whether motion is 
> > > a wakeup event, so we have to assume that any mouse will send a wakeup 
> > > request only when a button is pressed.  This makes it impossible to do 
> > > idle-time suspending.
> > 
> > That is a bit strong. I'd say this should mean that idle-time suspending
> > isn't the default, but for those devices that readily wake, it still can 
> > save
> > energy.
> 
> How does the kernel find out whether a particular mouse will wake up in 
> response to motion?

There's always "userspace configuration", to cope with the evident
reality that the USB descriptors don't provide all the answers.
Probably a bit specifically for autosuspend.

I suspect the kernel might benefit from a bit in the tables of
devices that it recognizes ... maybe with vendor defaults.

- Dave


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