DietPi Software | Mopidy fresh installation playback but no sound

[arkhub]

Fix: https://github.com/Fourdee/DietPi/issues/2536#issuecomment-462433840

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Creating a bug report/issue

Required Information

• DietPi version : 6.21.1
• Distro version : stretch
• Kernel version : Linux 4.14.79-v7+ Letsencrypt supports Free Noip.com Dynamic DNS #1159 SMP Sun Nov 4 17:50:20 GMT 2018 armv7l GNU/Linux
• SBC device : RPi 3 Model B+ (armv7l)
• Power supply used : 5V 3A
• SDcard used : 32 gb microsd card

Additional Information (if applicable)

• Software title : mopidy
• Was the software title installed freshly or updated/migrated? fresh installation of mopidy (but dietpi software was updated from 6.19 to 6.20 and 6.21 before)
• Can this issue be replicated on a fresh installation of DietPi? I think yes

Steps to reproduce

1. install mopidy from dietpi-software
2. open browser at http://raspberry-pi-address:6680/musicbox_webclient/
3. try to play sample audio

Expected behaviour

• sound should be played

Actual behaviour

• no sound at all but playback running

Extra details

• try sound test using gst-launch-1.0 audiotestsrc ! audioresample ! alsasink produce sounds
• stopping the mopidy services and then execute mopidyctl -v command makes the playback works (there's sound!)
• exiting mopidyctl -v and starting the services again using service mopidy start and the sounds dissapears again.

[MichaIng]

@arkhub
Thanks for your report.

We will investigate.

[Fourdee]

Confirmed bug, no ALSA stream active, will investigate:

Feb 11 18:09:42 DietPi mopidy[1045]: WARNING  Failed looking up file:///mnt/diet
pi_userdata/Music/%5BRadio%20Streams%5D.m3u8: gst-stream-error-quark: Stream con
tains no data. (4)
Feb 11 18:09:43 DietPi mopidy[1045]: WARNING  Failed looking up file:///mnt/diet
pi_userdata/Music/%5BRadio%20Streams%5D.m3u8: gst-stream-error-quark: Stream con
tains no data. (4)
Feb 11 18:09:44 DietPi mopidy[1045]: WARNING  GStreamer warning: gst-resource-er
ror-quark: Could not open audio device for playback. (6)

[Fourdee]

Fix:

dietpi-services stop
usermod -a -G dietpi,audio -d $G_FP_DIETPI_USERDATA/mopidy mopidy
dietpi-services start

[Fourdee]

@arkhub

Many thanks for reporting this issue 👍

You can apply the fix now with: https://github.com/Fourdee/DietPi/issues/2536#issuecomment-462433840

Also patched for v6.22.

Completed

 DietPi-JustBoom
─────────────────────────────────────────────────────
 Mode: ALSA Output Info

access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 440
buffer_size: 8820