Comment 2 for bug 1505505

the problem is this meta package:
ubuntu-mate-desktop also available for willy http://packages.ubuntu.com/wily/ubuntu-mate-desktop
as seen on this page its depend on vlc-plugin-pulse

the vlc ppa for 3.0* there: https://launchpad.net/~videolan/+archive/ubuntu/master-daily doesn't have the "transitional dummy package" vlc-plugin-pulse any more