Comment 27 for bug 303679

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nodrogkooc (gordon-cook-comsol-it) wrote :

The first one labelled <IEC958>, not C/F/R or U I guess the master for IEC958, it appears as a slider in alsamixer but as a tick box only under gnome-alsamixer. It was gnome-alsamixer that led to me finding it, as it was a tick box, I unticked it (which mutes the channel) and hey presto started working. Some where along the way an alsa specific update must have unmuted it or changed its behaviour.