Comment 16 for bug 172654

The workaround was the same one that Sami recommended above:

    amixer controls %% search the id of IEC-default (at my system 35)
    amixer -c 0 cset numid=35 6 %% 6 = 96kHz

This workaround works only for a short while... The sound typically runs OK at power-up and sometime later stops... I have not traced the sound stopping to any action.

I have gotten into the habit of plugging my speakers into my headphone jack, so I have not done any further investigation since August.