[arch-general] "Failed to start Light Display Manager"

[Ralf Mardorf]

Hi,

https://git.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/lightdm&id=aca8e3c06dc550e6cf0f011cb69e4e2c488e63cc
does cause lightdm failing to start. Just downgrading fixed the issue.

I don't know how useful my logfiles are, since I booted Arch Linux from
an Ubuntu install in a systemd-nspawn container to downgrade lightdm.

I can't spend time before next weekend, so I restrain from reporting it
to the bugtracker right now.

[root at archlinux rocketmouse]# grep 'downgraded lightdm' /var/log/pacman.log
[2017-12-18 18:50] [ALPM] downgraded lightdm (1:1.24.0-2 -> 1:1.24.0-1)
[root at archlinux rocketmouse]# cat /var/log/lightdm/x-0.log.old
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
(EE) 
Fatal server error:
(EE) Cannot establish any listening sockets - Make sure an X server isn't already running(EE) 
(EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.
[root at archlinux rocketmouse]# tail -20 /var/log/lightdm/lightdm.log.old 
[+0.01s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.02s] 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: Process 84 exited with return value 1
[+0.02s] DEBUG: XServer 0: X server stopped
[+0.02s] DEBUG: Releasing VT 7
[+0.02s] DEBUG: XServer 0: Removing X server authority /run/lightdm/root/:0
[+0.02s] DEBUG: Seat seat0: Display server stopped
[+0.02s] DEBUG: Seat seat0: Stopping session
[+0.02s] DEBUG: Seat seat0: Session stopped
[+0.02s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+0.02s] DEBUG: Seat seat0: Stopping; greeter display server failed to start
[+0.02s] DEBUG: Seat seat0: Stopping
[+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
[+0.03s] DEBUG: Exiting with return value 1
[rocketmouse at archlinux ~]$ grep EE /var/log/Xorg.0.log.old 
[   421.426] (EE) 
[   421.426] (EE) Cannot establish any listening sockets - Make sure an X server isn't already running(EE) 
[   421.426] (EE) 
[   421.426] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   421.426] (EE) 
[   421.426] (EE) Server terminated with error (1). Closing log file.
[rocketmouse at archlinux ~]$ uname -a
Linux archlinux 4.14.3-rt5-1-rt-pussytoes #1 SMP PREEMPT RT Tue Dec 12 08:01:30 CET 2017 x86_64 GNU/Linux

Regards,
Ralf