Public bug reported:

I have a Fujitsu P5020 laptop running Karmic. When I adjust my
pulseaudio volume, the output from either speakers or headphones if
they're plugged in is constant, and not affected by the pulseaudio
slider until it reaches around 80%.

Further investigation reveals that the ALSA master channel does nothing,
whereas the ALSA headphones channel is what affects volume in both
headphones and laptop speakers. Since pulseaudio only plays with Master
and PCM, only when pulseaudio slider is at 80% and it starts upping the
PCM is when a change in volume is noted.

Ideally, if there was some way to swap or tie together the ALSA master
and headphones channels, this would hopefully fix the problem.
Alternatively, if pulseaudio could be configured to play with the
headphones ALSA slider rather than Master, that should also fix the
problem. I feel the former solution is more elegant though.

ALSAmixergui reveals the following hw info:
Card: Intel 82801DB-ICH4
Chip: Realtek ALC202 rev 0

I don't know whether to file this bug under ALSA or the audio driver.
The whole linux audio thing to me still seems a mystery! :-)

** Affects: ubuntu
     Importance: Undecided
         Status: New

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master ALSA volume slider does not affect actual volume
https://bugs.launchpad.net/bugs/514158
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