Comment 5 for bug 418627

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John Mylchreest (jmylchreest) wrote : Re: No sound in Karmic (HDA Intel ICH6 & Realtek ALC260)

For me the problem was arecord holding open the snd device, this was because of the randomsound init script kicking it off to generate entropy. try lsof | grep snd, and see anything is opening those devices directly. Confirm, first of all with pulseaudio -vv.