CODEWITHSUNDEEP
linuxgstreameralsa
Mobin
Mobin

Reputation: 1

Playback open error: -16,Device or resource busy

I am trying alsa speaker-test utility after playing a .mp3 file using gst-play-1.0 in my customized Linux Os.but the speaker-test utility is unable to produce the sound over any channel and its producing a following error message given below.

speaker-test -p 1000 -t wav -c 6 -s 6

speaker-test 1.2.1

Playback device is default Stream parameters are 48000Hz, S16_LE, 6 channels WAV file(s) Playback open error: -16,Device or resource busy.

Based on my analysis, I found that the audio card/device "/dev/snd/pcmC0D0p" was used by gst-play-1.0 and its is not released even after gst-play-1.0 command execution.

I could see the result of lsof /dev/snd/* as

root 29u CHR 116,16 0t0 13359 /dev/snd/pcmC0D0p

Is anyone know how to release this resource so that I can use it for speaker-test ?

Upvotes: 0

Views: 3064

Answers (1)

Daniel Chaves
Daniel Chaves

Reputation: 412

Your device is busy and your lsof shows about a process using the device, just that doesn't seems to indicate the exact command where this comes. Probably because of the CoreUtils your custom Linux uses for these tools, in this case lsof. Otherwise you will have a little more info, some output similar to this one:

$ lsof /dev/video*
COMMAND     PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
gst-launc 20425  my-user   5u   CHR   81,0      0t0  606 /dev/video0

As your lsof seems to indicate that someone is using that device, let's suppose it is an instance of speaker-test. So that you can just do a process search and kill that process to free the device; rerun lsof and see if the device is now available. If it is try again with your sound test!

ps aux | grep speaker

kill -9 <PID for Speaker>
lsof /dev/snd/*

Upvotes: 0

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