Are you sure that it is driver bug instead of pulseaudio
there is 6 dB gain in those playback volume controls
state.PCH {
control.1 {
iface MIXER
name 'Headphone Playback Volume'
value.0 127
value.1 127
comment {
access 'read write'
type INTEGER
count 2
range '0 - 127'
dbmin -5750
dbmax 600
dbvalue.0 600
dbvalue.1 600
}
}
control.3 {
iface MIXER
name 'Speaker Playback Volume'
value.0 0
value.1 0
comment {
access 'read write'
type INTEGER
count 2
range '0 - 127'
dbmin -5750
dbmax 600
dbvalue.0 -5750
dbvalue.1 -5750
}
}
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https://bugs.launchpad.net/bugs/1244932
Title:
[Macmini5,1, Cirrus Logic CS4206, Green Headphone Out, Front] volume
slider problem
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