[Bug 34615] Keys on multimedia keyboard do not control volume of rear speakers.

[Rinaldo Maldera]

Public bug report changed:
https://launchpad.net/malone/bugs/34615

Comment:
Something similar happens on my Inspiron 9300. Volume keys control
Master which changes the volume of front speakes but the bass remains
the same (is controlled with Master Mono which was turned off by
default). But PCM controls the volume of all the speakers at the same
time.