More info Alan Pope G+
Colin Law said to activate it in the boot menu. And indeed there is an option.
The reboot went normally, hard to tell if it is quickier ot not (maybe a couple of secondes).
There is the first lines of my journalctl:
niko@UMATE1504:~$ journalctl
– Logs begin at lun. 2015-03-09 13:32:48 CET, end at lun. 2015-03-09 13:34:51 C
mars 09 13:32:48 UMATE1504 systemd-journal[204]: Runtime journal is using 4.8M (
mars 09 13:32:48 UMATE1504 systemd-journal[204]: Runtime journal is using 4.8M (
mars 09 13:32:48 UMATE1504 kernel: Initializing cgroup subsys cpuset
mars 09 13:32:48 UMATE1504 kernel: Initializing cgroup subsys cpu
mars 09 13:32:48 UMATE1504 kernel: Initializing cgroup subsys cpuacct
mars 09 13:32:48 UMATE1504 kernel: Linux version 3.18.0-13-generic (buildd@komai
mars 09 13:32:48 UMATE1504 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-3.18.0
mars 09 13:32:48 UMATE1504 kernel: KERNEL supported cpus:
mars 09 13:32:48 UMATE1504 kernel: Intel GenuineIntel
mars 09 13:32:48 UMATE1504 kernel: AMD AuthenticAMD
mars 09 13:32:48 UMATE1504 kernel: Centaur CentaurHauls