the reason for no master playback volume/switch is
master rename as master surround but no headphone playback volume/switch
state.I82801AAICH {
control.1 {
iface MIXER
name 'Master Surround Playback Switch'
value.0 true
value.1 true
comment {
access 'read write'
type BOOLEAN
count 2
}
}
control.2 {
iface MIXER
name 'Master Surround Playback Volume'
value.0 17
value.1 17
comment {
access 'read write'
type INTEGER
count 2
range '0 - 31'
dbmin -4650
dbmax 0
dbvalue.0 -2100
dbvalue.1 -2100
}
}
static int patch_ad1888_specific(struct snd_ac97 *ac97)
{
if (!ac97->spec.ad18xx.lo_as_master) {
/* rename 0x04 as "Master" and 0x02 as "Master Surround" */
snd_ac97_rename_vol_ctl(ac97, "Master Playback",
"Master Surround Playback");
snd_ac97_rename_vol_ctl(ac97, "Headphone Playback",
"Master Playback");
}
return patch_build_controls(ac97, snd_ac97_ad1888_controls,
ARRAY_SIZE(snd_ac97_ad1888_controls));
}
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https://bugs.launchpad.net/bugs/1487168
Title:
[Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider
problem
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