Comment 3 for bug 1357713

> First of all, for the removal of upstart, one must install package systemd-sysv.

Right, that will switch the default init to systemd. If you want to experiment with that, you can do either that or boot with init=/bin/systemd (you don't need both).

This is indeed not officially supported yet as there are still some hundred packages to update which only have upstart jobs, but for a day to day desktop it works quite fine these days.