Ardour isn't able to connect to JACK

Installation & Configuration Linux
#1

Hy

I managed it to install Ardour 2.0.2 on my Ubuntu Feisty System.

But now, when I try to start Ardour there is a dialogue that says that Ardour isn’t able to connect to JACK.

There are given 3 possible reasons for this problem:

  1. JACK isn’t running.
  2. JACK was started under another user, possibly root.
  3. There’s another client called ‘ardour’.

(this is translated from German into English)

I already tested whether JACK is running by typing

which jack

in the Terminal. The result was the line:

/usr/src/jack

so Jack is running.

I’m not able to solve the problem, maybe you are able to solve it.
Please help me,

Sapphire

#2

  1. the existence of /usr/src/jack does not mean that JACK is running

  2. it appears that you did not install JACK from a Ubuntu package which is probably a better approach for you

  3. you should also install qjackctl and use it to start jack, just because its easier and prettier.

#3

qjackctl is installed

But maybe its enough when you just tell me how to start a jack server

#4

You can use something like

jackd -R -dalsa -dhw:0 -r48000 -p256 -n2

Anyway, qjackctl may be easier to find the proper parameters for you (depending on your soundcard and kernel, “realtime” latencies may not be reachable)