LightDM Configuration on Arch Linux

After an Arch Linux minimal install and when installing LightDM, one should activate the

logind-check-graphical=true

line on file

/etc/lightdm/lightdm.conf

as true before starting the LightDm service. This configures your system to check first if graphics are active before starting the display manager. If you encounter a blank screen and are unable to go to a tty, boot with Arch install media, chroot into your installation and mark this line as true. This solved the problem for me.