Home / ubuntu / Questions / 1281192
In Process
Thomas Landauer
Asked: 2020-10-09 09:18:35 +0800 CST

Cantata (mpd) not playing after upgrading to kubuntu 20.04

  • 772

After upgrading from Kubuntu 18.04 to 20.04 I have no sound in Cantata. When I hit the play button, the progress bar is not advancing.

mpd's log file at /var/log/mpd/mpd.log shows:

ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave
exception: Failed to open "My ALSA Device" (alsa)
exception: nested: Failed to open ALSA device "default": No such file or directory

  • Cantata version 2.4.1
  • mpd: Music Player Daemon 0.21.20
sound upgrade mpd

1 Answers

  1. From all things I tried, I guess in the end it were two problems:

    Wrong file permissions of /etc/mpd.conf

    Run this in a console:

    mpd -v

    I don't know what -v is doing exactly - it's not even documented at man mpd :-( Anyway, if you're getting

    exception: Failed to open '/etc/mpd.conf': Permission denied

    ... you need to fix this first. Give read access to user "mpd" (group "audio") - or just to anybody :-)

    If you're getting

    config_file: loading file /etc/mpd.conf

    ... this step is OK.

    The rest of the output isn't important - it probably just means that mpd is already running (which is OK):

    exception: Failed to bind to '127.0.0.1:6600'
    exception: nested: Failed to bind socket: Address already in use

    Wrong audio device

    lspci -knn|grep -iA2 audio

    ... shows me that I have two devices. Open mpd.conf and find

    audio_output {
    type        "alsa"
    name        "My ALSA Device"
#   device      "hw:0,0"    # optional

    Change the last line to

        device      "hw:1,0"    # optional

    Maybe you need to restart:

    sudo service mpd restart

    This fixed it for me :-)

    • 0