Asus N551JK - subwoofer and Linux

# Install the jack override utility
sudo apt-get install alsa-tools-gui
# Launch the tool
hdajackretask
# Select the right codec (Realtek ALC668)
# Show unconnected pins
# Check 'override' for the pin 0x1a
# Pick 'Internal speaker (LTE)'
# List the audio managers
sudo fuser -v /dev/snd/*
# Kill them all
pkill xfce4-volumed
pkill volti
killall pulseaudio
# Apply the changes in hdajackretask
# Restart the managers
xfce4-volumed
# via Alt-F2:
pulseaudio
# Test. If it works, install boot override.



# Resources:
https://www.reddit.com/r/linux/comments/17sov5/howto_beats_audio_hp_laptop_speakers_on/c89e8rc
http://askubuntu.com/a/526137
http://ubuntuforums.org/showthread.php?t=2217683