may be pulseaudio should not merge/use the virtual master by differientate the virtual master volume/switch control of snd-hda-intel driver from the master volume/switch of ac97 codec (e.g. mono control vs stereo control)
may be pulseaudio should not merge/use the virtual master by differientate the virtual master volume/switch control of snd-hda-intel driver from the master volume/switch of ac97 codec (e.g. mono control vs stereo control)