On 20 July 2017 at 17:39, Yuri <yuri@rawbw.com> wrote:

On 07/20/2017 01:44, John Rigg wrote:

Because it was compiled with dbus support. That makes jackd refuse
to start unless it thinks X is running. I recompile jack2 on Debian
without dbus for this reason.

This appears to be a wrong behavior that jackd ever requires a DISPLAY variable, because sound should have nothing to do with X.

I'm not going to disagree with you, but your distaste is directed at the wrong list. Jack2 uses dbus to cooperate with pulseaudio so that they can co-exist on the same machine. And while I'd personally rather run jack by itself, pulseaudio unfortunately seems to be a requirement for eg. bluetooth audio on linux at present.

-Rowan