● gdm.service - GNOME Display Manager
   Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enabled)
   Active: active (running) since Thu 2017-04-20 17:16:18 CEST; 6min ago
 Main PID: 1085 (gdm3)
    Tasks: 3 (limit: 4915)
   CGroup: /system.slice/gdm.service
           └─1085 /usr/sbin/gdm3

apr 20 17:18:18 tungsteno gdm3[1085]: GdmDisplay: display lasted 0,282425 seconds
apr 20 17:18:18 tungsteno gdm3[1085]: Child process -14151 was already dead.
apr 20 17:18:18 tungsteno gdm3[1085]: Child process 14137 was already dead.
apr 20 17:18:18 tungsteno gdm3[1085]: Unable to kill session worker process
apr 20 17:18:18 tungsteno gdm-launch-environment][14169]: pam_unix(gdm-launch-environment:session): session opened for user gdm by (uid=0)
apr 20 17:18:18 tungsteno gdm3[1085]: Could not start command '/usr/lib/gdm3/gdm-session-worker': Too many open files
apr 20 17:18:18 tungsteno gdm3[1085]: GLib: g_child_watch_add_full: assertion 'pid > 0' failed
apr 20 17:18:18 tungsteno gdm3[1085]: Child process -14184 was already dead.
apr 20 17:18:18 tungsteno gdm3[1085]: Child process 14169 was already dead.
apr 20 17:18:18 tungsteno gdm3[1085]: Unable to kill session worker process