USB autosuspend in F12

[Matthew Garrett]

On Wed, Jun 10, 2009 at 05:16:41PM +0200, Roberto Ragusa wrote:
> Matthew Garrett wrote:
> > The first part of this is an upload of libfprint which enables 
> > autosuspend on fingerprint readers.
> 
> Fingerprint readers and other "un-unpluggable" USB laptop stuff
> such as flash-readers, bluetooth adapters etc. are perfect candidates
> for suspending.

USB mass storage is more awkward, but otherwise yes. Note that this 
isn't inherently about suspending the device - they may go into a power 
savig state, but it's not required that they be fully powered down. The 
issue is more about letting the *bus* power down. How much we save will 
depend on the specific bus layout on a given machine, and also whether 
we can successfully autosuspend all of the drivers.
-- 
Matthew Garrett | mjg59 at srcf.ucam.org