Comment 3 for bug 1654448

I would like to share that I found this post referring to a similar issue where sound settings weren't maintained, maintained being a better word than saved because I believe alsamixer might properly save the settings.

According to the post it is pulseaudio which is actually modifying the settings:

http://askubuntu.com/a/549939

I tested as suggested, by modifying the "Headphone Mic Boost" within alsamixer and exiting. I then ran:

pulseaudio -k

And pulseaudio reset the "Headphone Mic Boost" to dB gain 0.00, 0.00. The hissing reappeared.

If I could get pulseaudio to stop resetting the "Headphone Mic Boost" in alsamixer, then that would be an acceptable workaround.

But, I think the real issue still needs to be resolved. One would expect a dB gain 0.00, 0.00 to be absolutely silent. The user should not need to kick it up a notch to dB gain 10.00, 10.00.