[RESOLVED] LightDM fails to start after system upgrade

Thorned_Rose · 2016-04-12 03:32:51

LightDM was working fine up until I did a system upgrade a few days ago (in which lightdm-webkit2-greeter had issues).

When I tried to do an system upgrade, Pacman came up with the error:

looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: lightdm-webkit2-greeter: installing webkit2gtk (2.12.0-2) breaks dependency 'webkit2gtk<2.12'
:: lightdm-webkit2-greeter: installing gtk3 (3.20.2-1) breaks dependency 'gtk3<3.20'

See here for more info:
https://forum.antergos.com/topic/4263/i … t2-greeter
https://github.com/Antergos/antergos-packages/issues/94

I made the stupid mistake of temporarily uninstalling lightdm-webkit2-greeter to upgrade everything else. Since the webkit2 greeter was broken because of the GTK updates, I switched to using SDDM until the webkit2 greeter was updated.

Once the webkit2 greeter was updated and it was confirmed to now be working, I installed it again, disabled SDDM and enabled LightDM again.

However, when I did tried to start the lightdm.service, I got this error:

Job for lightdm.service failed because the control process exited with error code. See "systemctl status lightdm.service" and "journalctl -xe" for details.

I tried completely removing LightDM, all it's greeters and themes, deleting the config files and reinstalling (LightDM and lightdm-gtk-greeter) and editing the lightdm config file appropriately (left as default except to change the greeter to lightdm-gtk-greeter).

No difference, exactly the same errors.

In between I also switched to the Deepin DE (from Openbox although I still have Openbox installed) and installed the Deepin greeter (again editing config file to change the greeter). No difference. Interestingly, Deepin's lock screen works just fine.

Here's the log files:

Lightdm.log

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.18.1, UID=0 PID=1765
[+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: 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
[+0.01s] DEBUG: Monitoring logind for seats
[+0.01s] DEBUG: New seat added from logind: seat0
[+0.01s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.01s] DEBUG: Seat seat0: Starting
[+0.01s] DEBUG: Seat seat0: Creating greeter session
[+0.01s] DEBUG: Seat seat0: Creating display server of type x
[+0.01s] DEBUG: Could not run plymouth --ping: Failed to execute child process "plymouth" (No such file or directory)
[+0.01s] DEBUG: Using VT 7
[+0.01s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.01s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+0.01s] DEBUG: DisplayServer x-0: Writing X server authority to /run/lightdm/root/:0
[+0.01s] DEBUG: DisplayServer x-0: Launching X Server
[+0.01s] DEBUG: Launching process 1772: /usr/sbin/X :0 -seat seat0 -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.01s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+0.01s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.01s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+0.01s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.01s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+0.01s] DEBUG: Process 1772 exited with return value 1
[+0.01s] DEBUG: DisplayServer x-0: X server stopped
[+0.01s] DEBUG: Releasing VT 7
[+0.02s] DEBUG: DisplayServer x-0: Removing X server authority /run/lightdm/root/:0
[+0.02s] DEBUG: Seat seat0: Display server stopped
[+0.02s] DEBUG: Seat seat0: Stopping; greeter display server failed to start
[+0.02s] DEBUG: Seat seat0: Stopping
[+0.02s] DEBUG: Seat seat0: Stopping session
[+0.02s] DEBUG: Seat seat0: Session stopped
[+0.02s] DEBUG: Seat seat0: Stopped
[+0.02s] DEBUG: Required seat has stopped
[+0.02s] DEBUG: Stopping display manager
[+0.02s] DEBUG: Display manager stopped
[+0.02s] DEBUG: Stopping daemon
[+0.02s] DEBUG: Seat seat0: Stopping session

journalctl:

[rose@visas-marr ~]$ journalctl -u lightdm.service | grep "Apr 12"
Apr 12 10:57:31 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 10:57:31 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 10:57:31 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 10:57:31 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 10:57:31 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 10:57:31 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 10:57:31 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 10:57:31 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 10:57:31 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 10:57:31 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 10:57:31 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 10:57:32 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 10:57:32 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 10:57:32 visas-marr systemd[1]: lightdm.service: Start request repeated too quickly.
Apr 12 10:57:32 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:48 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 11:04:49 visas-marr lightdm[1721]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 11:04:49 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 11:04:49 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 11:04:49 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 11:04:49 visas-marr lightdm[1731]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 11:04:49 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 11:04:49 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 11:04:49 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 11:04:49 visas-marr lightdm[1746]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 11:04:49 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 11:04:49 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 11:04:50 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 11:04:50 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 11:04:50 visas-marr lightdm[1756]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 11:04:50 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 11:04:50 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 11:04:50 visas-marr systemd[1]: Starting Light Display Manager...
Apr 12 11:04:50 visas-marr lightdm[1765]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 12 11:04:50 visas-marr systemd[1]: Failed to start Light Display Manager.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 12 11:04:50 visas-marr systemd[1]: Stopped Light Display Manager.
Apr 12 11:04:50 visas-marr systemd[1]: lightdm.service: Start request repeated too quickly.
Apr 12 11:04:50 visas-marr systemd[1]: Failed to start Light Display Manager.

lightdm.conf: http://pastebin.com/JDz5rPtn

An internet search of "Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?" comes up with next to nothing or nothing that I can see as helpful anyway.
Help much appreciated

Last edited by Thorned_Rose (2016-04-18 01:24:35)

loafer · 2016-04-12 05:05:31

Are you using Arch or Antergos?

Thorned_Rose · 2016-04-12 06:59:04

I'm using Arch.

 rose@visas-marr
 OS: Arch Linux 
 Kernel: x86_64 Linux 4.4.5-1-ARCH
 Uptime: 9m
 Packages: 1229
 Shell: bash 4.3.42
 Resolution: 1920x1200
 WM: Mutter(DeepinGala)
 WM Theme: Adwaita
 Icon Theme: deepin
 Font: DejaVu Sans 10
 CPU: Intel Core2 Quad CPU Q6600 @ 2.4GHz
 GPU: GeForce GTX 650 Ti
 RAM: 1385MiB / 6979MiB

(The Antergos links are because the webkit2 greeter is maintained by the Antergos team)

Thorned_Rose · 2016-04-13 22:51:09

After the latest rounds of updates, still having this problem. Was hopeful that something weird was going on in a distantly related package but no dice. Still getting this error:

Job for lightdm.service failed because the control process exited with error code. See "systemctl status lightdm.service" and "journalctl -xe" for details.

with the same errors in the log files in my first post.

Thorned_Rose · 2016-04-14 00:19:30

Xorg.0.log:

[  3082.682] _XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
[  3082.682] _XSERVTransMakeAllCOTSServerListeners: server already running
[  3082.682] (EE) 
Fatal server error:
[  3082.682] (EE) Cannot establish any listening sockets - Make sure an X server isn't already running(EE) 
[  3082.682] (EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
[  3082.682] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[  3082.682] (EE) 
[  3082.682] (EE) Server terminated with error (1). Closing log file.

mrunion · 2016-04-14 11:21:40

What does

journalctl -xe

tell you? The error message indicated you should look there first.

Thorned_Rose · 2016-04-14 21:51:35

mrunion wrote:

What does
journalctl -xe
tell you? The error message indicated you should look there first.

Apr 15 09:48:33 visas-marr lightdm[26700]: Failed to use bus name org.freedesktop.DisplayManager, do you hav
Apr 15 09:48:33 visas-marr systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Apr 15 09:48:33 visas-marr systemd[1]: Failed to start Light Display Manager.
-- Subject: Unit lightdm.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit lightdm.service has failed.
-- 
-- The result is failed.
Apr 15 09:48:33 visas-marr systemd[1]: lightdm.service: Unit entered failed state.
Apr 15 09:48:33 visas-marr systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 15 09:48:33 visas-marr systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Apr 15 09:48:33 visas-marr systemd[1]: Stopped Light Display Manager.
-- Subject: Unit lightdm.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit lightdm.service has finished shutting down.
Apr 15 09:48:33 visas-marr systemd[1]: lightdm.service: Start request repeated too quickly.
Apr 15 09:48:33 visas-marr systemd[1]: Failed to start Light Display Manager.
-- Subject: Unit lightdm.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit lightdm.service has failed.
-- 
-- The result is failed.

Same error as in my first post

Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions?

Thorned_Rose · 2016-04-18 01:23:59

After the next round of updates in which the Nvidia drivers (v364.16-2) and the kernel (4.5-1) were upgraded, the issue seemingly resolved itself. I have no idea exactly what fixed it. I do recall seeing a thread somewhere about Nvidia drivers causing problems with LightDM and that for them rolling back the drivers resolved their problem. So possibly it was a video driver issue.

I'll mark this as resolved as opposed to solved given I never actually worked out what the problem was and fixed it.

Arch Linux

#1 2016-04-12 03:32:51

[RESOLVED] LightDM fails to start after system upgrade

#2 2016-04-12 05:05:31

Re: [RESOLVED] LightDM fails to start after system upgrade

#3 2016-04-12 06:59:04

Re: [RESOLVED] LightDM fails to start after system upgrade

#4 2016-04-13 22:51:09

Re: [RESOLVED] LightDM fails to start after system upgrade

#5 2016-04-14 00:19:30

Re: [RESOLVED] LightDM fails to start after system upgrade

#6 2016-04-14 11:21:40

Re: [RESOLVED] LightDM fails to start after system upgrade

#7 2016-04-14 21:51:35

Re: [RESOLVED] LightDM fails to start after system upgrade

#8 2016-04-18 01:23:59

Re: [RESOLVED] LightDM fails to start after system upgrade

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