I have an iMon PAD remote, which (mostly) works as it should [some buttons still don't work at all], but recently the volume up and volume down buttons have been muting the audio altogether (though they show the correct changes in volume in the OSD).

Any ideas how to troubleshoot this, as it's a pain with the PuleAudio bug that won't unmute the sound unless I use the mixer.

(Using 12.04 with 0.25-fixes)