This is the output:
nvidia@tegra-ubuntu:~$ systemctl status display-manager
��● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enabl
Active: active (running) since Thu 2021-09-16 16:40:04 AEST; 3h 7min ago
Process: 1169 ExecStartPre=/usr/share/gdm/generate-config (code=exited, status
Main PID: 1192 (gdm3)
Tasks: 4 (limit: 4915)
CGroup: /system.slice/gdm.service
��└��─1192 /usr/sbin/gdm3
Sep 16 19:48:00 tegra-ubuntu gdm3[1192]: GdmDisplay: display lasted 0.491382 sec
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Child process -8287 was already dead.
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Child process 8269 was already dead.
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Unable to kill session worker process
Sep 16 19:48:01 tegra-ubuntu gdm-launch-environment][8306]: pam_unix(gdm-launch-
Sep 16 19:48:01 tegra-ubuntu gdm-launch-environment][8306]: pam_unix(gdm-launch-
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Child process -8324 was already dead.
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Child process 8306 was already dead.
Sep 16 19:48:01 tegra-ubuntu gdm3[1192]: Unable to kill session worker process
Sep 16 19:48:01 tegra-ubuntu gdm-launch-environment][8339]: pam_unix(gdm-launch-