c - ALSA errors when running pulseaudio examples -

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the errors in question these:

alsa lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable open slave

alsa lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable open slave

alsa lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable open slave

alsa lib pcm.c:2239:(snd_pcm_open_noupdate) unknown pcm cards.pcm.rear

alsa lib pcm.c:2239:(snd_pcm_open_noupdate) unknown pcm cards.pcm.center_lfe

alsa lib pcm.c:2239:(snd_pcm_open_noupdate) unknown pcm cards.pcm.side

alsa lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable open slave

i've tried can think of, including editing alsa.conf , uninstalling/reinstalling related packages.

any appreciated.


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