> > I have a problem of hearing white-noise on my headphones when I plug them in my laptop. I know the work around: > > $ amixer -c 0 cset 'numid=10' 1 > numid=10,iface=MIXER,name='Headphone Mic Boost Volume' > ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0 > : values=1,1 > | dBscale-min=0.00dB,step=10.00dB,mute=0 > > OR > > $ amixer -c0 sset 'Headphone Mic Boost' 1 > Simple mixer control 'Headphone Mic Boost',0 > Capabilities: volume > Playback channels: Front Left - Front Right > Capture channels: Front Left - Front Right > Limits: 0 - 3 > Front Left: 1 [33%] [10.00dB] > Front Right: 1 [33%] [10.00dB] > > Done, no more white noise. It's all well, but the settings are not remembered; every time pulseaudio restarts (when I login to my Desktop, basically): > > $ amixer -c 0 cget 'numid=10' > numid=10,iface=MIXER,name='Headphone Mic Boost Volume' > ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0 > : values=0,0 > | dBscale-min=0.00dB,step=10.00dB,mute=0 > > Notice the 0,0? And the white noise is back. > > So my end goal is to find my way into hacking pulseaudio so that this is taken care of without having to do it myself via command line everytime I use my headphones. > > That's where my understanding of things starts to break down. Basically, I think it's not possible to control this property in pulseaudio at the moment, so I may need to write/update a module (frankly I'm not actually sure of that - but I'm not afraid of coding C). I started reading the coding page on the pulseaudio modules of <a href="http://freedesktop.org">freedesktop.org</a>, but that did not really inspire me to find a solution to my issue. So I would like to know if one of you could guide me a bit. <a href="https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/hda_generic.c?id=e7fdd52779a6c2b49d457f452296a77c8cffef6a">https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/hda_generic.c?id=e7fdd52779a6c2b49d457f452296a77c8cffef6a</a> You need to mute loopback mixing path, the noise seem to be feedback of the combo jack