Korg Radias: mdia via USB?

[Christian Convey]

Does anyone know if/how I can get my Radias to have a MIDI connection
to my Ubuntu Studio 9.04 computer, over USB?

I'm very new to connecting a MIDI keyboard to a PC.  I just bought a
Korg Radias, and it has a USB connector.  The Radias software for
Windows has a USB-MIDI driver.  It works fine on Windows, but I have
no idea how to tell if Ubuntu Studio's software can see the keyboard
via MIDI.  Any suggestions?

I don't have a separate USB-MIDI conversion box, so at the moment the
Radia's USB port is my only hope of connecting the keyboard to my PC.