Ich habe ein Problem, dass LightDM nicht startet, wenn es im Testmodus ausgeführt wird lightdm --test-mode.
Nachdem ich dasselbe im Debug ausgeführt habe, war dies die Ausgabe:
[+0.00s] DEBUG: Logging to /home/vilsol/.cache/lightdm/log/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.14.2, UID=1000 PID=31996
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/40-lightdm-webkit-greeter.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-greeter-wrapper.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-xserver-command.conf
[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/gnome/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/upstart/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/xdg-gnome/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Running in user mode
[+0.00s] DEBUG: Using Xephyr for X servers
[+0.00s] DEBUG: Registered seat module xlocal
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.01s] DEBUG: Monitoring logind for seats
[+0.01s] DEBUG: New seat added from logind: seat0
[+0.01s] DEBUG: Loading properties from config section SeatDefaults
[+0.01s] DEBUG: Seat seat0: Starting
[+0.01s] DEBUG: Seat seat0: Creating greeter session
[+0.01s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.01s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+0.02s] DEBUG: User /org/freedesktop/Accounts/User1002 added
[+0.02s] DEBUG: User /org/freedesktop/Accounts/User1001 added
[+0.02s] DEBUG: Seat seat0: Creating display server of type x
[+0.02s] DEBUG: Seat seat0: Starting local X display
[+0.02s] DEBUG: DisplayServer x-1: Logging to /home/vilsol/.cache/lightdm/log/x-1.log
[+0.02s] DEBUG: DisplayServer x-1: Writing X server authority to /home/vilsol/.cache/lightdm/run/root/:1
[+0.03s] DEBUG: DisplayServer x-1: Launching X Server
[+0.03s] DEBUG: Launching process 32000: /usr/bin/Xephyr :1 -seat seat0 -auth /home/vilsol/.cache/lightdm/run/root/:1 -nolisten tcp
[+0.03s] DEBUG: DisplayServer x-1: Waiting for ready signal from X server :1
[+0.03s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.03s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+0.07s] DEBUG: Got signal 10 from process 32000
[+0.07s] DEBUG: DisplayServer x-1: Got signal from X server :1
[+0.07s] DEBUG: DisplayServer x-1: Connecting to XServer :1
[+0.08s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+0.08s] DEBUG: Session: Not setting XDG_VTNR
[+0.08s] DEBUG: Session pid=32012: Started with service 'lightdm-greeter', username 'vilsol'
[+0.08s] DEBUG: Session pid=32012: Authentication complete with return value 0: Success
[+0.08s] DEBUG: Seat seat0: Session authenticated, running command
[+0.08s] DEBUG: Session pid=32012: Not setting XDG_VTNR
[+0.08s] DEBUG: Session pid=32012: Running command /usr/lib/lightdm/lightdm-greeter-session /usr/bin/lightdm-webkit-greeter
[+0.08s] DEBUG: Creating shared data directory /var/lib/lightdm-data/vilsol
[+0.08s] DEBUG: Session pid=32012: Logging to /home/vilsol/.cache/lightdm/log/x-1-greeter.log
[+0.20s] DEBUG: Session pid=32012: Greeter closed communication channel
[+0.20s] DEBUG: Session pid=32012: Terminated with signal 11
[+0.20s] DEBUG: Seat seat0: Session stopped
[+0.20s] DEBUG: Seat seat0: Stopping; failed to start a greeter
[+0.20s] DEBUG: Seat seat0: Stopping
[+0.20s] DEBUG: Seat seat0: Stopping display server
[+0.20s] DEBUG: Sending signal 15 to process 32000
[+0.21s] DEBUG: Process 32000 exited with return value 0
[+0.21s] DEBUG: DisplayServer x-1: X server stopped
[+0.21s] DEBUG: DisplayServer x-1: Removing X server authority /home/vilsol/.cache/lightdm/run/root/:1
[+0.21s] DEBUG: Seat seat0: Display server stopped
[+0.21s] DEBUG: Seat seat0: Stopped
[+0.21s] DEBUG: Required seat has stopped
[+0.21s] DEBUG: Stopping display manager
[+0.21s] DEBUG: Display manager stopped
[+0.21s] DEBUG: Stopping daemon
[+0.21s] DEBUG: Exiting with return value 1
Es gibt keine tatsächlichen Fehler, aber aus irgendeinem Grund sagt der Begrüßer, dass der Begrüßer nicht gestartet wurde. Wenn ich neu starte, wird LightDM ordnungsgemäß angezeigt, es muss also etwas speziell mit dem Testmodus zu tun haben.
Antwort1
Nur für das Archiv, da die Frage ziemlich alt ist (aber ein Top-Google-Ergebnis).
Wenn Sie einen Blick auf $HOME/.cache/lightdm/log/x-0.log werfen, werden Ihnen möglicherweise weitere Fehler wie diese angezeigt:
Fatal server error:
(EE) Cannot establish any listening sockets - Make sure an X server isn't already running(EE)
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
(EE)
Sie sollten lightdm als Display-Manager verwenden, wenn Sie es mit „--test-mode“ testen (das ist irgendwie unintuitiv, etwas auszuführen, das man erst testen möchte...). Vielleicht verwenden Sie gdm3 oder einen anderen dm?