[LAU] Issues with esi midimate II

Hi all,
after the last system upgrade (archlinux), my MIDI interface
stopped working with jack.

It is an ESI Midimate II (http://www.esi-audio.com/products/midimate2)

This is the interface entry from /proc/asound/cards:
 2 [II ]: USB-Audio - MIDIMATE II
                      Egosys MIDIMATE II at usb-0000:00:1a.0-1.2.2, full speed

This is the interface entry from lsusb:
Bus 001 Device 012: ID 0a92:10c2 EGO SYStems, Inc.

This is how I start jackd:
$ jackd --realtime -d alsa -r 44100 -n 2 -p 1024 -d hw:0

The interface has worked fine until today.
How can I debug this?

Thanks,

-- 
Carlo Ascani   |   www.carlorat.me
carloratm@email-addr-hidden
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