Alsa upgrade: sound only from one app [Solved]

Hello,
after upgrade to alsa 1.0.21 only one application can play sound. E.g. if MPD (using ALSA output) plays then any ather application (mplayer for example) cannot. Here's mplayer output:
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
[AO_ALSA] alsa-lib: conf.c:4626:(snd_config_expand) Expand error (walk): File exists
[AO_ALSA] alsa-lib: pcm_hw.c:1325:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed: Device or resource busy
[AO_ALSA] Playback open error: Device or resource busy
[JACK] cannot open server
[AO SDL] Samplerate: 44100Hz Channels: Stereo Format s16le
[AO_ALSA] alsa-lib: conf.c:4626:(snd_config_expand) Expand error (walk): File exists
[AO_ALSA] alsa-lib: pcm_hw.c:1325:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed: Device or resource busy
I've downloaded and compiled older alsa-{lib,utils} 1.0.20 from ABS. Now's everything fine.
Last edited by cinan (2009-09-10 12:15:52)

I had a similar issue with MPD blocking sound on ac97. Commenting out optional decelerations under audio_output in /etc/mpd.conf fixed it.
/etc/mpd.conf wrote:audio_output {
        type            "alsa"
        name            "My ALSA Device"
        #device         "hw:0,0"        # optional
        #format         "44100:16:2"    # optional
        #mixer_device   "default"       # optional
        mixer_control   "PCM"           # optional
        #mixer_index    "0"             # optional

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