Alsa device or resource busy

[DawidJanczak]

Hello.

I have some problems when running shell-fm and another application using Alsa. Scenarios tried:

1.) Start shell-fm and play a song. Start VLC. A message appears: Audio output failed: The audio device "default" could not be used: Device or resource busy.

2.) Start shell-fm and play a song. Run aplay and similar message appears: ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave aplay: main:682: audio open error: Device or resource busy

3.) Start VLC and play a movie. Start shell-fm. A different message appears: ao_alsa WARNING: Unable to open surround playback. Trying default device...

This does seem like Alsa problem, however the issue only occurs when shell-fm is running. I can play aplay, youtube and vlc altogether without any problems.