<p><br>
>><br>
>> ><br>
>> > Thank you for your reply, <br>
>> ><br>
>> > Please see below the output of alsa-info.sh before and after the headphone plugged in<br>
>> ><br>
>> > Before:<a href="http://www.alsa-project.org/db/?f=a316eebf7b150b5897838be37bce4e8c9d95eaae"> http://www.alsa-project.org/db/?f=a316eebf7b150b5897838be37bce4e8c9d95eaae</a><br>
>> > After: <a href="http://www.alsa-project.org/db/?f=0f163003e9005972db5f97f21a45be67816e3801"> http://www.alsa-project.org/db/?f=0f163003e9005972db5f97f21a45be67816e3801</a><br>
>> ><br>
>> > I have 6 Jacks at the rear panel and two at the top (one output one input)<br>
>> > I am afraid I do not know how to switch channel mode to retask.<br>
>> ><br>
>> > Also, the computer is of a certain age, and the issue has started several month ago but I never really looked into it, so I am not sure that change in power management will be relevant has it seems quite recent. </p>
<p>If you plugged the speaker into the black jack, </p>
<p>Seem you are using stereo profile since surround dac still using channel=0 </p>
<p>Auto mute was disabled when you select ac97 front audio panel</p>
<p>Do you expect pulseaudio just mute the surround playback switch but keep the surround playack volume remain unchanged when you select stereo profile ?</p>
<p>Node 0x11 [Audio Output] wcaps 0x41d: Stereo Amp-Out<br>
Control: name="Surround Playback Volume", index=0, device=0<br>
ControlAmp: chs=3, dir=Out, idx=0, ofs=0<br>
Amp-Out caps: ofs=0x2a, nsteps=0x2a, stepsize=0x05, mute=0<br>
Amp-Out vals: [0x00 0x00]<br>
Converter: stream=5, channel=0<br>
PCM:<br>
rates [0x5e0]: 44100 48000 88200 96000 192000<br>
bits [0xe]: 16 20 24<br>
formats [0x1]: PCM<br>
Power states: D0 D1 D2 D3<br>
Power: setting=D0, actual=D0</p>
<p>Node 0x18 [Audio Selector] wcaps 0x30050d: Stereo Amp-Out<br>
Control: name="Surround Playback Switch", index=0, device=0<br>
ControlAmp: chs=3, dir=Out, idx=0, ofs=0<br>
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1<br>
Amp-Out vals: [0x80 0x80]<br>
Power states: D0 D1 D2 D3<br>
Power: setting=D0, actual=D0<br>
Connection: 1<br>
0x11<br></p>
<p>control.36 {<br>
iface CARD<br>
name 'Line Out Front Jack'<br>
value false<br>
comment {<br>
access read<br>
type BOOLEAN<br>
count 1<br>
}<br>
}<br>
control.37 {<br>
iface CARD<br>
name 'Line Out Surround Jack'<br>
value true<br>
comment {<br>
access read<br>
type BOOLEAN<br>
count 1<br>
}<br>
}<br>
control.38 {<br>
iface CARD<br>
name 'Line Out CLFE Jack'<br>
value false<br>
comment {<br>
access read<br>
type BOOLEAN<br>
count 1<br>
}<br>
}<br>
control.39 {<br>
iface CARD<br>
name 'Line Out Side Jack'<br>
value false<br>
comment {<br>
access read<br>
type BOOLEAN<br>
count 1<br>
}<br>
}<br>
control.40 {<br>
iface CARD<br>
name 'Front Headphone Phantom Jack'<br>
value true<br>
comment {<br>
access read<br>
type BOOLEAN<br>
count 1<br>
}<br>
}<br></p>
<p>Simple mixer control 'Surround',0<br>
Capabilities: pvolume pswitch<br>
Playback channels: Front Left - Front Right<br>
Limits: Playback 0 - 42<br>
Mono:<br>
Front Left: Playback 0 [0%] [-63.00dB] [off]<br>
Front Right: Playback 0 [0%] [-63.00dB] [off]<br></p>
<p>> As advices I changed the Bios setting from AC97 to HD Audio.</p>
<p>Do your computer chassis have a hda front audio panel ?</p>
<p>> Now upon start up or pulseaudio being restarted the headphones is muted, but the surround channel isn't any more. As mentioned I would like both channel not to be muted.<br>
> Please find below the output of pulseaudio -vvvv:</p>
<p>You have to kill pulseaudio first <br></p>
<p>> E: [pulseaudio] pid.c: Daemon already running.<br>
> E: [pulseaudio] main.c: pa_pid_file_create() failed.<br>
> <br>
</p>