[LAU] syncing ardour with rosegarden thorn

[Dieter Plaetinck]

Hi guys,
using:
ardour 2.8.7
rosegarden thorn (tried both official release and latest svn version)
jackd version 0.116.2 tmpdir /dev/shm protocol 24
(started as `/usr/bin/jackd -dalsa -dhw:0 -r48000 -p512 -n8`)
ArchLinux 32bit (default kernel)

I try to sync the transports, so that both play at the same time.
In rosegarden, "edit->preferences->use jack transport" is enabled
In ardour, I set 'time master' on, and tried both the 'internal' and
'jack' sync source.

but when i play/pause etc in ardour, nothing happens in rosegarden. 
How can i make this work?
thanks,
Dieter