I'm unable to get lightdm to start properly.
bash-4.2$ cat log
[+0.00s] DEBUG: Logging to /usr/var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.7.6, UID=0 PID=3305
[+0.00s] DEBUG: Loading configuration from /usr/etc/lightdm/lightdm.conf
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Registered seat module xlocal
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.00s] DEBUG: Adding default seat
[+0.00s] DEBUG: Starting seat
[+0.00s] DEBUG: Starting local X display
[+0.00s] DEBUG: Could not run plymouth --ping: Failed to execute child process "plymouth" (No such file or directory)
[+0.00s] DEBUG: Using VT 7
[+0.00s] DEBUG: Logging to /usr/var/log/lightdm/x-0.log
[+0.00s] DEBUG: Writing X server authority to /usr/var/run/lightdm/root/:0
[+0.00s] DEBUG: Launching X Server
[+0.00s] DEBUG: Launching process 3308: /usr/bin/X :0 -auth /usr/var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.00s] DEBUG: Waiting for ready signal from X server :0
[+0.00s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+0.46s] DEBUG: Got signal 10 from process 3308
[+0.46s] DEBUG: Got signal from X server :0
[+0.46s] DEBUG: Connecting to XServer :0
[+0.46s] DEBUG: Display server ready, starting session authentication
[+0.46s] DEBUG: Started session 3316 with service 'lightdm-greeter', username 'lightdm'
[+0.46s] DEBUG: Session 3316 authentication complete with return value 0: Success
[+0.46s] DEBUG: Session authenticated, running command
[+0.46s] DEBUG: Session 3316 running command /usr/bin/lightdm-gtk-greeter
[+0.46s] DEBUG: org.freedesktop.Accounts does not exist, falling back to passwd file
[+0.46s] DEBUG: Activating VT 7
[+0.46s] DEBUG: Greeter closed communication channel
[+0.46s] DEBUG: Session 3316 exited with return value 1
[+0.46s] DEBUG: Session stopped
[+0.46s] DEBUG: Stopping seat, failed to start a greeter
[+0.46s] DEBUG: Stopping seat
[+0.46s] DEBUG: Stopping display server
[+0.46s] DEBUG: Sending signal 15 to process 3308
[+0.72s] DEBUG: Process 3308 exited with return value 0
[+0.72s] DEBUG: X server stopped
[+0.72s] DEBUG: Removing X server authority /usr/var/run/lightdm/root/:0
[+0.72s] DEBUG: Releasing VT 7
[+0.72s] DEBUG: Display server stopped
[+0.72s] DEBUG: Seat stopped
[+0.72s] DEBUG: Required seat has stopped
[+0.72s] DEBUG: Stopping display manager
[+0.72s] DEBUG: Display manager stopped
[+0.72s] DEBUG: Stopping daemon
[+0.72s] DEBUG: Exiting with return value 1
bash-4.2$