[SOLVED] LightDM not starting after shutdown, but it works on reboot.

ALobhos · 2020-09-07 20:23:57

Hello.

A few months ago I installed Arch following the installation guide found in the wiki. I installed LightDM with lightdm-gtk-greeter and had no issues with it. But last week I updated my system packages and stuff with pacman -Syu and now my DM doesn't work correctly.

I've uninstalled and reinstalled lightDM and gtk-greeter and it seems to work. However if I shutdown my system and turn it on again, lightDM doesn't starts. Interestingly if I log in a tty session I'm able to start lightDM correctly with sudo lightdm, or even if I don't start it. If I log to a tty session, and reboot, lightDM will start with no problem on boot.

I've tried to read for some troubleshooting but haven't found something similar, especially because it works if i reboot the system.

Here is the log for lightdm on the failed start:

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.30.0, UID=0 PID=639
[+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: Registered seat module local
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: _g_io_module_get_default: Found default implementation local (GLocalVfs) for ‘gio-vfs’
[+0.00s] DEBUG: Monitoring logind for seats
[+0.00s] DEBUG: New seat added from logind: seat0
[+0.00s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.00s] DEBUG: Seat seat0 has property CanMultiSession=no
[+0.00s] DEBUG: Seat seat0: Starting
[+0.00s] DEBUG: Seat seat0: Creating greeter session
[+0.00s] DEBUG: Seat seat0: Creating display server of type x
[+0.00s] DEBUG: posix_spawn avoided (fd close requested) 
[+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: Seat seat0: Starting local X display on VT 7
[+0.00s] DEBUG: XServer 0: Logging to /var/log/lightdm/x-0.log
[+0.00s] DEBUG: XServer 0: Writing X server authority to /run/lightdm/root/:0
[+0.00s] DEBUG: XServer 0: Launching X Server
[+0.00s] DEBUG: Launching process 645: /usr/bin/X :0 -seat seat0 -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.00s] DEBUG: XServer 0: 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
[+0.01s] 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
[+0.01s] DEBUG: Loading user config from /etc/lightdm/users.conf
[+0.01s] DEBUG: User alobhos added
[+0.07s] DEBUG: Process 645 exited with return value 1
[+0.07s] DEBUG: XServer 0: X server stopped
[+0.07s] DEBUG: Releasing VT 7
[+0.07s] DEBUG: XServer 0: Removing X server authority /run/lightdm/root/:0
[+0.07s] DEBUG: Seat seat0: Display server stopped
[+0.07s] DEBUG: Seat seat0: Stopping session
[+0.07s] DEBUG: Seat seat0: Session stopped
[+0.07s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+0.07s] DEBUG: Seat seat0: Stopping; greeter display server failed to start
[+0.07s] DEBUG: Seat seat0: Stopping
[+0.07s] DEBUG: Seat seat0: Stopped
[+0.07s] DEBUG: Required seat has stopped
[+0.07s] DEBUG: Stopping display manager
[+0.07s] DEBUG: Display manager stopped
[+0.07s] DEBUG: Stopping daemon
[+0.07s] DEBUG: Exiting with return value 1

Sorry if my english isn't very good, my mother language is spanish.

Last edited by ALobhos (2020-09-07 23:47:00)

seth · 2020-09-07 21:22:52

https://wiki.archlinux.org/index.php/Li … TTY_output

Edit: maybe https://wiki.archlinux.org/index.php/Ke … _KMS_start

Last edited by seth (2020-09-07 21:23:24)

ALobhos · 2020-09-07 23:46:16

Thank You!!

The first option apparently fixed the issue.
I wonder why rebooting the system didn't make lightDM fail.

seth · 2020-09-08 05:58:18

A warm reboot might simply have the GPU initialized faster.

Arch Linux

#1 2020-09-07 20:23:57

[SOLVED] LightDM not starting after shutdown, but it works on reboot.

#2 2020-09-07 21:22:52

Re: [SOLVED] LightDM not starting after shutdown, but it works on reboot.

#3 2020-09-07 23:46:16

Re: [SOLVED] LightDM not starting after shutdown, but it works on reboot.

#4 2020-09-08 05:58:18

Re: [SOLVED] LightDM not starting after shutdown, but it works on reboot.

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