Another interesting feature of the Release Candidate build of Deepin 15 is that the Ubuntu base has been dropped in favor of Debian GNU/Linux Sid. The Compiz window manager was replaced by Mutter and Metacity, bringing the intelligent switching of window managers functionality introduced in Deepin 15 Beta. Moreover, Deepin 15 RC is powered by Linux kernel 4.2, which includes additional Bluetooth, sound and networking drivers.