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Accepted
hingev
Asked: 2012-12-01 22:35:08 +0800 CST

"JACK server could not be started" when using Qjackctl

  • 772

I have a problem when I try to connect my guitar to my computer, via line input. Audacity works well, and I can record what I play on my guitar (selecting from Preferences from where to record to default:line0). But the problem is in Qjackctl : at first when I click on start it shows this error:

error 1

after that when I click on Cancel it gives this error:

error 2

This is the log from the messages window:

10:30:37.368 Patchbay deactivated.
10:30:37.416 Statistics reset.
10:30:37.459 ALSA connection change.
10:30:37.497 D-BUS: Service is available (org.jackaudio.service aka jackdbus).
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
10:30:37.512 ALSA connection graph change.
10:30:44.060 D-BUS: JACK server could not be started. Sorry
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Sat Dec  1 10:30:43 2012: Starting jack server...
Sat Dec  1 10:30:43 2012: JACK server starting in realtime mode with priority 10
Sat Dec  1 10:30:44 2012: control device hw:0
Sat Dec  1 10:30:44 2012: control device hw:0
Sat Dec  1 10:30:44 2012: [1m[31mERROR: Failed to acquire device name : Audio0 error : Method "RequestRelease" with signature "i" on interface "org.freedesktop.ReserveDevice1" doesn't exist
[0m
Sat Dec  1 10:30:44 2012: [1m[31mERROR: Audio device hw:0 cannot be acquired...[0m
Sat Dec  1 10:30:44 2012: [1m[31mERROR: Cannot initialize driver[0m
Sat Dec  1 10:30:44 2012: [1m[31mERROR: JackServer::Open failed with -1[0m
Sat Dec  1 10:30:44 2012: [1m[31mERROR: Failed to open server[0m
Sat Dec  1 10:30:45 2012: Saving settings to "/home/gevorg/.config/jack/conf.xml" ...
10:31:11.438 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started

Now I can't understand what my problem is.

dbus

8 Answers

  1. None of these solved my problem. This did: http://dpod.kakelbont.ca/2015/08/16/fixing-qjackctl

    1. In a terminal start qjackctl:

      qjackctl

    2. Before you try to start it, click the Setup button in the GUI (right-hand side, middle).

      enter image description here

    3. On the setup GUI change Input Device and Output Device (middle, right-hand side) from (default) to hw:PCH (In the screenshot one has been changed and the other has not).

      enter image description here

    4. Restart qJackCtl. You should now be able to successfully use the Start button.

    • 52
  2. Best Answer

    Try this from the command line: 

    pulseaudio --kill  
jack_control  start

    Then when your done do this: 

    jack_control exit  
pulseaudio --start

    And sometimes jack wont die, so then do

    Get jackd's PID: 

    ps -aux | grep jackd  
kill -9 jacksPID
    • 31

  3. I made it and solved:

    sudo killall -9 jackdbus
    • 10

  4. I solved the error d-bus jack server could not be started by deleting 

    ~/.config/rncbc.org/QjackCtl.conf

    and restarting qjackctl. In my case, I had messed up the settings, and it was stored in this file.

    • 6

  5. There are a lot of relevant explanations here:

    http://jackaudio.org/faq/pulseaudio_and_jack.html

    I have solved my problem after prefixing the server path with pasuspend -- and choosing the appropriate Interface (upper right corner) to the right sound device in my system, by clicking the > symbol and choosing from the list.

    • 3

  6. I used sudo killall -9 jackdbus

    Then sudo qjackctl

    That worked! But i don't get any sound and can't get my ffado mixer to run after that.

    • 2

  7. Running QJackCtl from commandline as root user fixed the issue for me.

    sudo qjackctl
    • 1

  8. Step 1. View audio cards

    cat /proc/asound/cards

    (view audio cards)

    Step 2: 

    pulseaudio --kill

    Step 3: 

    qjackctl

    In GUI find Interface:[default] and choose relevant audio card

    Press play |>

    Step 4:

    Run process requiring jackd (in my case, sonic-pi) then, when you're all done...

    Step 5:

    pulseaudio --start

    This is sort of a mashup of the previous answers, but it worked for me while none of the single answers did. It helped me to read a little about the differences between pulseaudio and jackd.

    I hope this helps!

    • 0