I'm trying to install an NVIDIA Driver, but I must turn off the Xserver first. I've tried a lot of methods I found online, but none seem to work.I'm using Antergos with GNOME.Ctrl + Alt + Backspace kills the server, but then the graphical login screen starts again.sudo service stop lightdm says there isn't a command serviceTried switching with Ctrl + Alt + f1 and then killing the server (with kill or pkill), but that had two outcomes: It did nothing or I got a blackscreensystemd <\something> also says there's no such command (systemd) Installing the drivers with pacman crashes my Antergos install and I must do a new installEDIT: Turned out that my Graphics Card supports optimus and I managed to install the drivers following this wiki post: Bumblebee for NVIDIA 
Need to stop the automatic start of login manager (Antergos, GNOME)
gnome;nvidia;lightdm;antergos