The service is active. When I started my laptop loaded services and it blocked with blackscreen, after I passed on tty I could entry on kde with startx
legion_of_artix:/home/saul # sv status /etc/runit/runsvdir/default/*
run: /etc/runit/runsvdir/default/agetty-tty1: (pid 1178) 40s
run: /etc/runit/runsvdir/default/agetty-tty2: (pid 1179) 40s
run: /etc/runit/runsvdir/default/agetty-tty3: (pid 1180) 40s
run: /etc/runit/runsvdir/default/agetty-tty4: (pid 1181) 40s
run: /etc/runit/runsvdir/default/agetty-tty5: (pid 1182) 40s
run: /etc/runit/runsvdir/default/agetty-tty6: (pid 1183) 40s
run: /etc/runit/runsvdir/default/dbus: (pid 1186) 40s
run: /etc/runit/runsvdir/default/elogind: (pid 1184) 40s
run: /etc/runit/runsvdir/default/NetworkManager: (pid 1193) 40s
run: /etc/runit/runsvdir/default/sddm: (pid 1192) 40s
run: /etc/runit/runsvdir/default/udevd: (pid 1185) 40s
legion_of_artix:/home/saul # pacman -Ss sddm
world/sddm 0.18.0-2 [installato]
QML based X11 and Wayland display manager
world/sddm-runit 20180507-1 (runit-world) [installato]
runit service scripts for sddm
galaxy/artix-sddm-theme 0.4-1
Artix theme for SDDM
extra/sddm 0.18.0-2 [installato]
QML based X11 and Wayland display manager
extra/sddm-kcm 5.14.5-1 (plasma) [installato]
KDE Config Module for SDDM