For those who wants a proper workaround using systemd - see https://wiki.archlinux.org/index.php/ASUS_Zenbook_UX430#Headphones_audio_is_too_low
For those who wants a proper workaround using systemd - see https:/ /wiki.archlinux .org/index. php/ASUS_ Zenbook_ UX430#Headphone s_audio_ is_too_ low