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Thread: *Another* jack problem

  1. #1
    Join Date
    Dec 2009
    Beans
    62

    *Another* jack problem

    Hello,
    I've been playing around with using Jack on my system, but can't get it to work properly.

    When I start QJackctl, I get this:
    Code:
    D-BUS: JACK server could not be started
    and this:
    p, li { white-space: pre-wrap; }
    Code:
    Could not connect to JACK server as client.
      - Overall operation failed.
      - Server communication error.
      Please check the messages window for more info

    The message window gives:


    Code:
      p, li { white-space: pre-wrap; }  
    Could not connect to JACK server as client. - Overall operation failed. - Server communication error. Please check the messages window for more info.
     JackSocketClientChannel read fail
     Cannot open qjackctl client

    In Patchage, I try to connect JACK, but it fails. Obviously, any client using Jack also doesn't open.
    Patchage also tells me that I am connected to ALSA, but I can't hear any audio coming from my web browser or Audacious.


    How do I fix this?




    Much thanks in advance,
    brian

  2. #2
    Join Date
    Jun 2008
    Beans
    1,301
    Distro
    Ubuntu Studio

    Re: *Another* jack problem

    Turn off d-bus support in qjacktl settings.

  3. #3
    Join Date
    Dec 2009
    Beans
    62

    Re: *Another* jack problem

    I turned it off, but I still get the error:

    Code:
      p, li { white-space: pre-wrap; }  Could not connect to JACK server as client. - Overall operation failed. - Server communication error. Please check the messages window for more info.
     JackSocketClientChannel read fail
     Cannot open qjackctl client
    What is the method to get jack to function correctly? Is it as simple as opening QJackCtl and clicking "start?"


    Brian

  4. #4
    Join Date
    Dec 2006
    Beans
    1,540

    Re: *Another* jack problem

    Hi, do a quick google of your soundcard/motherboard soundchip name
    with ubuntu qjackctl

    there should be several discussions to read. These commands list
    playback and recording devices.

    aplay -l
    arecord -l
    aconnect -i
    aconnect -o
    cat /proc/asound/cards
    lspci
    lsusb
    lsmod (lists kernel modules)

    Items in brackets can be inserted in
    qjackctl setup page

    Input Device >
    OutputDevice >

    click > widget to see your soundcards. Replace hw:0 or similar with the
    soundcard name in brackets from aplay -l

    http://en.wikipedia.org/wiki/Qjackctl screenshots and configs
    at links 4 and 8 on the wiki page, many videos on youtube, for
    hydrogen, ardour, zynaddsubfx, rakarrack will also cover
    qjackctl connections.

  5. #5
    Join Date
    Dec 2009
    Beans
    62

    Re: *Another* jack problem

    Quote Originally Posted by sgx View Post
    Hi, do a quick google of your soundcard/motherboard soundchip name
    with ubuntu qjackctl

    there should be several discussions to read. These commands list
    playback and recording devices.

    aplay -l
    arecord -l
    aconnect -i
    aconnect -o
    cat /proc/asound/cards
    lspci
    lsusb
    lsmod (lists kernel modules)

    Items in brackets can be inserted in
    qjackctl setup page

    Input Device >
    OutputDevice >

    click > widget to see your soundcards. Replace hw:0 or similar with the
    soundcard name in brackets from aplay -l

    http://en.wikipedia.org/wiki/Qjackctl screenshots and configs
    at links 4 and 8 on the wiki page, many videos on youtube, for
    hydrogen, ardour, zynaddsubfx, rakarrack will also cover
    qjackctl connections.
    Thanks for all the suggestions, sgx.
    I finally have everything working, even though I really don't know what it is that made everything fit together. I tried changing hw:0 with other options, but that didn't work. But when I rebooted, the settings were back to their original ones, and things are working!

    So for now I'm happy as a lark, with several softsynths that are all working as they should. A bit of a mystery, but QJack is working nonetheless!

    hopefully your post will be of help to others, too!

    Thanks again.
    brian

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