Comment 3 for bug 150089

Possibly related to the fact the mixer_applet2 doest control the sound correctly on the usb devices anyway -> changes to volume affect only one channel, changing other channels or 'locking' the controls together seem to temporarily increase cpu + not work

Anyway most likely not helpful. I cant seem to consistently reproduce this, if anyone else has any clues?
like run a strace on the process id of mixer_applet2 when cpu is hogged?