Somewhere in March we got an update in that makes our shutdown look different.
We see now a lot of strange lines.
Nick Petrov went to look for a solution and found a way to hide these messages.
Follow his procedure:
Edit the file /etc/mkinitcipo.conf with sublime-text and add “shutdown” to the hooks. Then save it.
Then run the following code in the terminal
sudo mkinitcpio -p linux
When you have rebooted, you will see less lines when you shutdown.
There is no need to do this. It is just for cosmetic reasons.