[+529598.17s] DEBUG: Got signal 15 from process 1
[+529598.17s] DEBUG: Caught Terminated signal, shutting down
[+529598.17s] DEBUG: Stopping display manager
[+529598.17s] DEBUG: Seat seat0: Stopping
[+529598.17s] DEBUG: Seat seat0: Stopping display server
[+529598.17s] DEBUG: Sending signal 15 to process 1240
[+529598.17s] DEBUG: Seat seat0: Stopping session
[+529598.17s] DEBUG: Session pid=1476: Sending SIGTERM
[+529598.22s] DEBUG: Session pid=1476: Terminated with signal 1
[+529598.22s] DEBUG: Seat seat0: Session stopped
[+529598.30s] DEBUG: Seat seat0 changes active session to 
[+529598.30s] CRITICAL: session_get_login1_session_id: assertion 'session != NULL' failed
[+529598.59s] DEBUG: Process 1240 exited with return value 0
[+529598.59s] DEBUG: DisplayServer x-0: X server stopped
[+529598.59s] DEBUG: Releasing VT 7
[+529598.59s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0
[+529598.59s] DEBUG: Seat seat0: Display server stopped
[+529598.59s] DEBUG: Launching process 30699: /sbin/prime-switch
[+529598.59s] DEBUG: Process 30699 exited with return value 1
[+529598.59s] DEBUG: Seat seat0: Exit status of /sbin/prime-switch: 1
[+529598.59s] DEBUG: Seat seat0: Stopped
[+529598.59s] DEBUG: Display manager stopped
[+529598.59s] DEBUG: Stopping daemon
[+529598.59s] DEBUG: Exiting with return value 0