Midi input device not visible

I have a midi keyboard which I’ve connected to my laptop via a USB port. In the Ardour connections manager window I expected to see this listed, to connect it up to a MIDI track I created. However I don’t see it.
Looking at my version of jackd2, it’s 1.9.7, and apparently 1.9.8 has had a lot of new work to implement MIDI drivers. Can someone confirm my plan of action, which is:-

  1. Uninstall my current Jack2
  2. Manually install the latest Jack2

My O/S is Ubuntu 11.10


Perfect. MIDI input device now visible. Thanks Paul.