What you are describing works only with alsa backend. No -X with "jackd -d firewire --help", and it's greyed out in Qjackctl too.

a2jmidid seems to be the only way to go while waiting for Rosegarden to support jack midi.

Thanks anyway

On 26 May 2010 13:08, jimmy <wg2002a@yahoo.com> wrote:

> Date: Wed, 26 May 2010 01:31:19 -0700 (PDT)
> From: James Warden <warjamy@yahoo.com>
> > I've tried http://home.gna.org/a2jmidid which routes
> alsa midi
> > to jack midi, but haven't had much luck with it.
> I would suggest you try the improved version of a2jmidid
> which Paul Davis (ardour's main dev) has revisited some time
> ago. I think it is in some git repository so you will have
> to compile it.
> Did you use a2jmidid with the -e option ? it enforces
> hardware ports to be translated as well to jack-midi.
> HTH,
> J.

No need to use a2jmidid.  No need for Rosegarden to do anything.

Recent jackd has the option -Xseq that automatically convert Alsa-midi to Jack-midi.  In qjackctl, choose "Setup", in the "Settings" tab, at the bottom left corner, for "MIDI Driver" option, select "seq", that will use the "-Xseq" option.