$ ps aux | grep -i dm
root 891 0.0 0.0 276560 6124 ? Ssl 19:51 0:00 /usr/sbin/lightdm
root 914 0.6 1.8 361836 151044 tty7 Ss+ 19:51 0:06 /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
root 1002 0.0 0.1 161276 12312 ? Ssl 19:51 0:00 /usr/bin/sddm
root 1020 1.9 5.5 1012740 454164 ? Ss 19:51 0:19 /usr/bin/X :1 -auth /var/run/sddm/:1 -nolisten tcp -background none -noreset vt7
sddm 1438 0.0 0.0 24484 2040 ? S 19:51 0:00 /usr/bin/dbus-launch --autolaunch 1004eea5e0e34787acf369cc1a2309ef --binary-syntax --close-stderr
sddm 1439 0.0 0.0 42376 2636 ? Ss 19:51 0:00 /usr/bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
sddm 1441 0.0 0.2 332156 20960 ? Sl 19:51 0:00 /usr/bin/kded5
sddm 1445 0.0 0.1 121948 9624 ? Ss 19:51 0:00 kdeinit5: Running...
sddm 1446 0.0 0.2 293256 19764 ? Sl 19:51 0:00 klauncher [kdeinit5] --fd=8
root 1505 0.0 0.1 218932 12196 ? SLl 19:51 0:00 /usr/lib/x86_64-linux-gnu/sddm/sddm-helper --socket /tmp/sddm-authca45b8b8-886c-4a77-b7a1-2369fc2ad69a --id 1 --start gnome-session-classic --user david
root 1556 0.0 0.0 181240 6968 ? Sl 19:51 0:00 lightdm --session-child 12 19
david 4416 0.0 0.0 9496 2352 pts/3 S+ 20:08 0:00 grep --color=auto --exclude-dir=.bzr --exclude-dir=.cvs --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn -i dm
