@Hui Wang, the alsa-info.txt for Yoga C930 is here http://alsa-project.org/db/?f=1ffb1551a46965865ee272cef105769e879397c7
@Hui Wang, alsa-project. org/db/ ?f=1ffb1551a469 65865ee272cef10 5769e879397c7
the alsa-info.txt for Yoga C930 is here
http://