anjaro /]# sudo lightdm –-test-mode --debug
[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.28.0, UID=0 PID=2522
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG:   [LightDM] contains unknown option greeter-session
[+0.00s] DEBUG: Using Xephyr for X servers
[+0.00s] DEBUG: Registered seat module local
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.03s] DEBUG: Monitoring logind for seats
[+0.03s] DEBUG: New seat added from logind: seat0
[+0.03s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.03s] DEBUG: Seat seat0: Starting
[+0.03s] DEBUG: Seat seat0: Creating greeter session
[+0.04s] DEBUG: Seat seat0: Creating display server of type x
[+0.04s] DEBUG: posix_spawn avoided (fd close requested)
[+0.05s] DEBUG: Could not run plymouth --ping: Failed to execute child process ?plymouth? (No such file or directory)
[+0.05s] DEBUG: Using VT 7
[+0.05s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.05s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log
[+0.05s] DEBUG: XServer 1: Can't launch X server Xephyr, not found in path
[+0.05s] DEBUG: XServer 1: X server stopped
[+0.05s] DEBUG: Releasing VT 7
[+0.05s] DEBUG: Seat seat0: Display server stopped
[+0.05s] DEBUG: Seat seat0: Can't create display server for greeter
[+0.05s] DEBUG: Seat seat0: Session stopped
[+0.05s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+0.05s] DEBUG: Seat seat0: Stopping
[+0.05s] DEBUG: Seat seat0: Stopped
[+0.05s] DEBUG: Failed to start seat: seat0