1) plug the headphone
2) open alsamixer
3) and unmute (press M) at the Speaker control.
* This have to be done every time after plugging the headphone.
Another workaround is**:
1) Open in text editor the file /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf
2) Comment the line as here: [Jack_InputDevice]
#code = Headphone
3) Save the file
4) Restart pulseaudio with:
pulseaudio -k
** This have to be done just once.
Answering your questions:
> * if the "Speaker" volume is turned all the way down to -48 dB (without muting it, just turning the volume all the way down), suddenly your headphones mute.
No, Skeaker volume level at alsamixer does not affect headphone at all. I was wrong when I said it before (about the -48 db), really sorry about that. The headphone output is affected by mutting/unmutting the Speaker control, but the volume level at this control does no affect headphone, not even at -48 db. Tested it again right now.
> * if the "Speaker" is -47 dB your headphones are unmuted
Yes.
> * if the "Speaker" is 0 dB your headphones are unmuted
Yes.
* regardless of "Speaker" is -47 dB or 0 dB, headphones have the same volume.
Yes. Headphone volume is affected by it's own volume control at alsamixer, but not affected by the volume level at Speaker's control.
Yes, one workaround is*:
1) plug the headphone
2) open alsamixer
3) and unmute (press M) at the Speaker control.
* This have to be done every time after plugging the headphone.
Another workaround is**:
1) Open in text editor the file /usr/share/ pulseaudio/ alsa-mixer/ paths/analog- output- headphones. conf
[Jack_ InputDevice]
2) Comment the line as here:
#code = Headphone
3) Save the file
4) Restart pulseaudio with:
pulseaudio -k
** This have to be done just once.
Answering your questions:
> * if the "Speaker" volume is turned all the way down to -48 dB (without muting it, just turning the volume all the way down), suddenly your headphones mute.
No, Skeaker volume level at alsamixer does not affect headphone at all. I was wrong when I said it before (about the -48 db), really sorry about that. The headphone output is affected by mutting/unmutting the Speaker control, but the volume level at this control does no affect headphone, not even at -48 db. Tested it again right now.
> * if the "Speaker" is -47 dB your headphones are unmuted
Yes.
> * if the "Speaker" is 0 dB your headphones are unmuted
Yes.
* regardless of "Speaker" is -47 dB or 0 dB, headphones have the same volume.
Yes. Headphone volume is affected by it's own volume control at alsamixer, but not affected by the volume level at Speaker's control.