ASUS Zenbook UX390
Volume increments don't work
Because of the "surround sound" audio hardware on the UX390, you have to tweak a Pulse configuration file to get volume incrementing to work. Otherwise, the volume will either be full or muted, despite appearing to increment.
Edit the analog output path config and add the
Element Master and
Element LFE parts below.
[Element Master] switch = mute volume = ignore [Element PCM] switch = mute volume = merge override-map.1 = all override-map.2 = all-left,all-right [Element LFE] switch = mute volume = ignore
Then, restart PulseAudio and changing the volume should work.
Headphone jack audio is always muted
alsamixer, select the "HDA Intel PCH" sound card, and adjust the "Headphone" slider to your liking. To make this persistent you may need to run
sudo alsactl store.