when you plugged the headphone and the driver return false when it
cannot detect headphone
pulseaudio switch to speaker profile and turn off the headphone volume
Control.13 {
iface CARD
name 'Front Headphone Jack'
value false
comment {
access read
type BOOLEAN
count 1
}
http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/paths/analog-output-speaker.conf
[Jack Headphone]
state.plugged = no
state.unplugged = unknown
; This profile path is intended to control the speaker, let's mute headphones
; else there will be a spike when plugging in headphones
[Element Headphone]
switch = off
volume = off
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https://bugs.launchpad.net/bugs/1225789
Title:
[FUJITSU AMILO La1703 audio playback] Audio volume extremely low
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