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/var/log/lightdm/
cat: /var/log/lightdm/: Is a directory
root@raspberrypi:~# cat /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.18.3, UID=0 PID=351
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.01s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/01_debian.conf
[+0.01s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.01s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.01s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.01s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.05s] DEBUG: Registered seat module xlocal
[+0.07s] DEBUG: Registered seat module xremote
[+0.07s] DEBUG: Registered seat module unity
[+0.53s] DEBUG: Monitoring logind for seats
[+0.53s] DEBUG: New seat added from logind: seat0
[+0.53s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.54s] DEBUG: Seat seat0: Starting
[+0.54s] DEBUG: Seat seat0: Creating user session
[+0.59s] WARNING: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files
[+0.63s] DEBUG: Loading user config from /etc/lightdm/users.conf
[+0.65s] DEBUG: User pi added
[+0.68s] DEBUG: Seat seat0: Creating display server of type x
[+0.77s] DEBUG: Using VT 7
[+0.77s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.77s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+0.77s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+0.77s] DEBUG: DisplayServer x-0: Launching X Server
[+0.79s] DEBUG: Launching process 378: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.79s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+0.81s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.82s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+6.25s] DEBUG: Got signal 10 from process 378
[+6.25s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+6.25s] DEBUG: DisplayServer x-0: Connecting to XServer :0
[+6.27s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+6.27s] DEBUG: Session pid=451: Started with service 'lightdm-autologin', username 'pi'
[+6.45s] DEBUG: Session pid=451: Authentication complete with return value 0: Success
[+6.45s] DEBUG: Seat seat0: Session authenticated, running command
[+6.45s] DEBUG: Registering session with bus path /org/freedesktop/DisplayManager/Session0
[+6.46s] DEBUG: Session pid=451: Running command /etc/X11/Xsession default
[+6.46s] DEBUG: Creating shared data directory /var/lib/lightdm/data/pi
[+6.47s] DEBUG: Session pid=451: Logging to .xsession-errors
[+7.21s] DEBUG: Activating VT 7
[+7.21s] DEBUG: Activating login1 session c1
[+7.21s] DEBUG: Seat seat0 changes active session to c1
[+7.21s] DEBUG: Session c1 is already active
[+10.97s] DEBUG: Session pid=451: Exited with return value 0
[+10.97s] DEBUG: Seat seat0: Session stopped
[+10.97s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+10.97s] DEBUG: Sending signal 15 to process 378
[+11.03s] DEBUG: Process 378 exited with return value 0
[+11.03s] DEBUG: DisplayServer x-0: X server stopped
[+11.03s] DEBUG: Releasing VT 7
[+11.03s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0
[+11.03s] DEBUG: Seat seat0: Display server stopped
[+11.03s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+11.03s] DEBUG: Seat seat0: Creating greeter session
[+11.04s] DEBUG: Seat seat0: Creating display server of type x
[+11.04s] DEBUG: Using VT 7
[+11.04s] DEBUG: Seat seat0: Starting local X display on VT 7
[+11.04s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+11.04s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+11.04s] DEBUG: DisplayServer x-0: Launching X Server
[+11.04s] DEBUG: Launching process 574: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+11.04s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+12.13s] DEBUG: Got signal 10 from process 574
[+12.13s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+12.13s] DEBUG: DisplayServer x-0: Connecting to XServer :0
[+12.14s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+12.14s] DEBUG: Session pid=581: Started with service 'lightdm-greeter', username 'lightdm'
[+12.26s] DEBUG: Session pid=581: Authentication complete with return value 0: Success
[+12.26s] DEBUG: Seat seat0: Session authenticated, running command
[+12.26s] DEBUG: Session pid=581: Running command /usr/sbin/pi-greeter
[+12.26s] DEBUG: Creating shared data directory /var/lib/lightdm/data/lightdm
[+12.26s] DEBUG: Session pid=581: Logging to /var/log/lightdm/seat0-greeter.log
[+13.16s] DEBUG: Activating VT 7
[+13.16s] DEBUG: Activating login1 session c2
[+13.17s] DEBUG: Seat seat0 changes active session to c2
[+13.17s] DEBUG: Session c2 is already active
[+13.87s] DEBUG: Greeter connected version=1.18.3 resettable=false
[+18.58s] DEBUG: Greeter start authentication for pi
[+18.58s] DEBUG: Session pid=627: Started with service 'lightdm', username 'pi'
[+18.76s] DEBUG: Session pid=627: Got 1 message(s) from PAM
[+18.76s] DEBUG: Prompt greeter with 1 message(s)
[+151713.26s] DEBUG: Continue authentication
[+151713.61s] DEBUG: Session pid=627: Authentication complete with return value 0: Success
[+151713.61s] DEBUG: Authenticate result for user pi: Success
[+151713.61s] DEBUG: User pi authorized
[+151713.62s] DEBUG: Greeter requests session lightdm-xsession
[+151713.62s] DEBUG: Seat seat0: Stopping greeter; display server will be re-used for user session
[+151713.62s] DEBUG: Session pid=581: Sending SIGTERM
[+151713.75s] DEBUG: Greeter closed communication channel
[+151713.76s] DEBUG: Session pid=581: Exited with return value 0
[+151713.76s] DEBUG: Seat seat0: Session stopped
[+151713.76s] DEBUG: Seat seat0: Greeter stopped, running session
[+151713.76s] DEBUG: Registering session with bus path /org/freedesktop/DisplayManager/Session1
[+151713.82s] DEBUG: Session pid=627: Running command /etc/X11/Xsession default
[+151713.82s] DEBUG: Creating shared data directory /var/lib/lightdm/data/pi
[+151713.84s] DEBUG: Session pid=627: Logging to .xsession-errors
[+151715.27s] DEBUG: Activating VT 7
[+151715.27s] DEBUG: Activating login1 session c4
[+151715.28s] DEBUG: Seat seat0 changes active session to
[+151715.28s] DEBUG: Seat seat0 changes active session to c4
[+151715.28s] DEBUG: Session c4 is already active
[+151718.25s] DEBUG: Session pid=627: Exited with return value 0
[+151718.25s] DEBUG: Seat seat0: Session stopped
[+151718.25s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+151718.25s] DEBUG: Sending signal 15 to process 574
[+151718.34s] DEBUG: Process 574 exited with return value 0
[+151718.34s] DEBUG: DisplayServer x-0: X server stopped
[+151718.34s] DEBUG: Releasing VT 7
[+151718.34s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0
[+151718.34s] DEBUG: Seat seat0: Display server stopped
[+151718.34s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+151718.34s] DEBUG: Seat seat0: Creating greeter session
[+151718.34s] DEBUG: Seat seat0: Creating display server of type x
[+151718.34s] DEBUG: Using VT 7
[+151718.34s] DEBUG: Seat seat0: Starting local X display on VT 7
[+151718.34s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+151718.34s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+151718.35s] DEBUG: DisplayServer x-0: Launching X Server
[+151718.35s] DEBUG: Launching process 32565: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+151718.35s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+151719.79s] DEBUG: Got signal 10 from process 32565
[+151719.79s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+151719.79s] DEBUG: DisplayServer x-0: Connecting to XServer :0
[+151719.82s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+151719.82s] DEBUG: Session pid=32577: Started with service 'lightdm-greeter', username 'lightdm'
[+151720.03s] DEBUG: Session pid=32577: Authentication complete with return value 0: Success
[+151720.03s] DEBUG: Seat seat0: Session authenticated, running command
[+151720.03s] DEBUG: Session pid=32577: Running command /usr/sbin/pi-greeter
[+151720.03s] DEBUG: Creating shared data directory /var/lib/lightdm/data/lightdm
[+151720.03s] DEBUG: Session pid=32577: Logging to /var/log/lightdm/seat0-greeter.log
[+151720.99s] DEBUG: Activating VT 7
[+151720.99s] DEBUG: Activating login1 session c5
[+151721.00s] DEBUG: Seat seat0 changes active session to c5
[+151721.00s] DEBUG: Session c5 is already active
[+151721.35s] DEBUG: Greeter connected version=1.18.3 resettable=false
[+151723.86s] DEBUG: Greeter start authentication for pi
[+151723.86s] DEBUG: Session pid=32610: Started with service 'lightdm', username 'pi'
[+151724.03s] DEBUG: Session pid=32610: Got 1 message(s) from PAM
[+151724.03s] DEBUG: Prompt greeter with 1 message(s)
/var/log/lightdm/x-0.log
X.Org X Server 1.19.2
Release Date: 2017-03-02
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.9.41-v7+ armv7l Raspbian
Current Operating System: Linux raspberrypi 4.14.98+ #1200 Tue Feb 12 20:11:02 GMT 2019 armv6l
Kernel command line: 8250.nr_uarts=0 bcm2708_fb.fbwidth=640 bcm2708_fb.fbheight=480 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:93:88:06 vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
Build Date: 18 October 2017 04:55:30PM
xorg-server 2:1.19.2-1+rpt1+deb9u2 (https://www.debian.org/support)
Current version of pixman: 0.34.0
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Fri May 10 12:49:42 2019
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
modprobe: FATAL: Module g2d_23 not found in directory /lib/modules/4.14.98+
/var/log/lightdm/x-0.log
X.Org X Server 1.19.2
Release Date: 2017-03-02
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.9.41-v7+ armv7l Raspbian
Current Operating System: Linux raspberrypi 4.14.98+ #1200 Tue Feb 12 20:11:02 GMT 2019 armv6l
Kernel command line: 8250.nr_uarts=0 bcm2708_fb.fbwidth=640 bcm2708_fb.fbheight=480 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:93:88:06 vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
Build Date: 18 October 2017 04:55:30PM
xorg-server 2:1.19.2-1+rpt1+deb9u2 (https://www.debian.org/support)
Current version of pixman: 0.34.0
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Fri May 10 12:49:42 2019
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
modprobe: FATAL: Module g2d_23 not found in directory /lib/modules/4.14.98+
root@raspberrypi:~# cat /var/log/lightdm/x-0-greeter.log
cat: /var/log/lightdm/x-0-greeter.log: No such file or directory
root@raspberrypi:~# cat /var/log/lightdm/x-0-greeter.log
cat: /var/log/lightdm/x-0-greeter.log: No such file or directory