Ubuntu
pulseaudio package

  1. Bug #1254884
  2. Comment #26

Comment 26 for bug 1254884

Revision history for this message
Raymond (superquad-vortex2) wrote : Re: Pulseaudio: incoherent muting of GStreamer channels (mutes master, headphone and speaker, but unmutes only master)

unfortunately stereo mix input is automatically disabled when automic is automatically selected for notebook

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/Documentation/sound/alsa/HD-Audio.txt

so you cannot record what you are playing unless you disable the automic and enable add_stereo_mix_input by early patching if your are using a notebook