I had what I thought was the same problem for a while. In the end it turned out that the mixer's PCM channel was wedged somehow at a really low volume. Double-clicking my volume applet to bring up the mixer and adjusting the PCM channel (which looked like it was at maximum volume but obviously wasn't) fixed everything.
I had what I thought was the same problem for a while. In the end it turned out that the mixer's PCM channel was wedged somehow at a really low volume. Double-clicking my volume applet to bring up the mixer and adjusting the PCM channel (which looked like it was at maximum volume but obviously wasn't) fixed everything.