linux lightdm启动阶段黑屏,lightdm无法启动的问题

[+0.00s] DEBUG: Starting Light Display Manager 1.24.0, UID=1001 PID=939

[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d

[+0.00s] DEBUG: Loading configuration from /usr/local/share/lightdm/lightdm.conf.d/cinnamon.conf

[+0.00s] DEBUG: Loading configuration from /usr/local/share/lightdm/lightdm.conf.d/dwm-1.conf

[+0.00s] DEBUG: Loading configuration from /usr/local/share/lightdm/lightdm.conf.d/dwm.conf

[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d

[+0.00s] DEBUG: Loading configuration dirs from /usr/local/etc/xdg/lightdm/lightdm.conf.d

[+0.00s] DEBUG: Loading configuration from /usr/local/etc/lightdm/lightdm.conf

[+0.00s] DEBUG: Running in user mode

[+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

[+0.00s] WARNING: Failed to get list of logind seats: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.login1 was not provided by any .service files

[+0.00s] DEBUG: Adding default seat

[+0.00s] DEBUG: Seat seat0: Loading properties from config section Seat:*

[+0.00s] DEBUG: Seat seat0: Starting

[+0.00s] DEBUG: Seat seat0: Creating user session

[+0.00s] DEBUG: Loading users from org.freedesktop.Accounts

[+0.00s] DEBUG: User /org/freedesktop/Accounts/User1001 added

[+0.01s] DEBUG: Seat seat0: Failed to find session configuration default

[+0.01s] DEBUG: Seat seat0: Can't find session 'default'

[+0.01s] DEBUG: Seat seat0: Creating greeter session

[+0.01s] DEBUG: Seat seat0: Creating display server of type x

[+0.09s] DEBUG: Could not run plymouth --ping: 执行子进程“plymouth"失败(No such file or directory)

[+0.09s] DEBUG: Seat seat0: Starting local X display

[+0.09s] DEBUG: XServer 1: Logging to ~/x-1.log

[+0.09s] DEBUG: XServer 1: Writing X server authority to /home/wu/.cache/lightdm/run/root/:1

[+0.09s] DEBUG: XServer 1: Launching X Server

[+0.09s] DEBUG: Launching process 941: /usr/local/bin/X :1 -seat seat0 -auth /home/wu/.cache/lightdm/run/root/:1 -nolisten tcp

[+0.09s] DEBUG: XServer 1: Waiting for ready signal from X server :1