[alsa-devel] Jack sensing in snd_usb_audio ?

[Bastien Nocera]

On Wed, 2016-10-12 at 14:43 +0200, Clemens Ladisch wrote:
> Bastien Nocera wrote:
> > Looks like whether or not jack sensing works depends on the device
> > itself, but there is a mechanism to propagate the change in setup
> > in
> > the USB Audio 2.0 spec
> 
> 
> Some recent Windows 10 beta added partial support for USB Audio 2.0.
> Earlier Windowses implement only USB Audio 1.0, which does not
> mention
> jacks.
> 
> > "
> > A change of state in the audio function is most often caused by a
> > certain event that takes place. An event can either be user-
> > initiated
> > or device-initiated. User-initiated jack insertion or removal is a
> > typical example of a user-initiated event.
> > "
> 
> 
> There are not many USB Audio 2.0 devices, and I'm not aware of any
> that actually implements this.

I guess I would see whether there are events if I captured the USB
traffic even without special handling/turning on a feature in the
drivers, right?