Step 1: View audio chip
head -n 1 /proc/asound/card0/codec*
Step 2: Open the file HD-Audio-Models.txt (.gz). To find their own sound chip (in this case ALC662) a number of modules available.
zless /usr/share/doc/alsa-base/driver/HD-Audio-Models.txt.gz
Step 3: Open the file alsa-base.conf, edit ALSA basic configuration. Add a line at the end options snd-hda-intel model=asus-mode1. Save and exit, then restart the computer.
sudo gedit /etc/modprobe.d/alsa-base.conf
Step 4: enter alsamixer, one by one review of the settings are correct, 'MM' represents the silent (mute). The figure is a headphone 'MM', did cause I insert earphone sound, press M switching to a non-mute.
Refer to the article " intel desktop solve ALC883 front audio output no sound teach you how to join the" switch "option Switches "
