Vlc 在 Ubuntu Xenial 上找不到任何音频输出模块：
$ vlc --ignore-config
VLC media player 2.2.8 Weatherwax (revision 2.2.7-14-g3cc1d8cba9)
[09207cc0] core audio output error: no suitable audio output module
[09207d60] core interface error: no suitable interface module
[091e6228] core libvlc error: interface "hotkeys,none" initialization failed
[09208018] core interface error: no suitable interface module
[091e6228] core libvlc error: interface "globalhotkeys,none" initialization failed
[09208018] core interface error: no suitable interface module
[091e6228] core libvlc error: interface "dbus,none" initialization failed
[091e6228] core libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[09208018] core interface error: no suitable interface module
[091e6228] core libvlc error: interface "default" initialization failed
[0920ced0] core playlist error: could not export playlist
编辑0：我的 Ubuntu 版本：
$ lsb_release -sa
No LSB modules are available.
Ubuntu
Ubuntu 16.04.6 LTS
16.04
xenial