Arch Linux

McCrow

Member

Registered: 2017-08-02

Posts: 6

Lightdm not opennig session.

Hi to All.

I'm probably missing something very simple, yet I cannot figure out what I did wrong.

I've tried to build my arch linux from the ground up adding only the necessary packages, and so fat I've got a working XFCE  with all my necessarry software working fine, but I cannot start it any other way than typing startxfce4 ( I can put it in my xinitrc script or even on my bashrc)
; but when I use lightdm, it seems that nothing happen when I correctly type in my password.

For information here's my uname -a output:

Linux ArchZ50 4.12.3-1-ARCH #1 SMP PREEMPT Sat Jul 22 15:32:02 UTC 2017 x86_64 GNU/Linux

Since I'm plannig on also having another Desktop environment ( maybe try some less common ones like budgie,deepin, pantheon or others) I'd really like to have one graphical login manager that does that while allowing for a fast logon ( just have to type my pass word, nothing more).

Thank you in advance for your time and help !

dockland

Member

From: Sweden

Registered: 2015-06-06

Posts: 861

Re: Lightdm not opennig session.

Have you enabled a greeter? Like gtk-greeter or likewise?

---

I possess a device, in my pocket, that is capable of accessing the entirety of information known to man.
I use it to look at funny pictures of cats and to argue with strangers.

loqs

Member

Registered: 2014-03-06

Posts: 19,113

Re: Lightdm not opennig session.

Please post the contents of /var/log/lightdm/lightdm.log and details of how you installed and configured lightdm.

McCrow

Member

Registered: 2017-08-02

Posts: 6

Re: Lightdm not opennig session.

here's the whole lightdm.log

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.22.0, UID=0 PID=649
[+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: Registered seat module unity
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+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: Starting
[+0.00s] DEBUG: Seat seat0: Creating greeter session
[+0.00s] DEBUG: Seat seat0: Creating display server of type x
[+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
[+0.01s] DEBUG: XServer 0: Writing X server authority to /run/lightdm/root/:0
[+0.01s] DEBUG: XServer 0: Launching X Server
[+0.01s] DEBUG: Launching process 655: /usr/sbin/X :0 -seat seat0 -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.01s] DEBUG: XServer 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
[+0.02s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.02s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+1.12s] DEBUG: Got signal 10 from process 655
[+1.12s] DEBUG: XServer 0: Got signal from X server :0
[+1.12s] DEBUG: XServer 0: Connecting to XServer :0
[+1.13s] CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
[+1.13s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+1.13s] DEBUG: Session pid=668: Started with service 'lightdm-greeter', username 'lightdm'
[+1.13s] DEBUG: Session pid=668: Authentication complete with return value 0: Success
[+1.13s] DEBUG: Seat seat0: Session authenticated, running command
[+1.13s] DEBUG: Launching process 671: /usr/bin/numlockx on
[+1.15s] DEBUG: Process 671 exited with return value 0
[+1.15s] DEBUG: Seat seat0: Exit status of /usr/bin/numlockx on: 0
[+1.15s] DEBUG: Session pid=668: Running command /usr/sbin/lightdm-gtk-greeter
[+1.15s] DEBUG: Creating shared data directory /var/lib/lightdm-data/lightdm
[+1.15s] DEBUG: Session pid=668: Logging to /var/log/lightdm/seat0-greeter.log
[+1.18s] DEBUG: Activating VT 7
[+1.18s] DEBUG: Activating login1 session c2
[+1.18s] DEBUG: Seat seat0 changes active session to c2
[+1.18s] DEBUG: Session c2 is already active
[+1.33s] DEBUG: Greeter connected version=1.22.0 api=1 resettable=false
[+1.44s] DEBUG: Greeter start authentication for perard
[+1.44s] DEBUG: Session pid=712: Started with service 'lightdm', username 'perard'
[+1.44s] DEBUG: Session pid=712: Got 1 message(s) from PAM
[+1.44s] DEBUG: Prompt greeter with 1 message(s)
[+10.18s] DEBUG: Continue authentication
[+12.04s] DEBUG: Session pid=712: Authentication complete with return value 7: Authentication failure
[+12.04s] DEBUG: Authenticate result for user perard: Authentication failure
[+12.04s] DEBUG: Session pid=712: Exited with return value 1
[+12.04s] DEBUG: Seat seat0: Session stopped
[+12.04s] DEBUG: Greeter start authentication for perard
[+12.04s] DEBUG: Session pid=714: Started with service 'lightdm', username 'perard'
[+12.05s] DEBUG: Session pid=714: Got 1 message(s) from PAM
[+12.05s] DEBUG: Prompt greeter with 1 message(s)
[+17.43s] DEBUG: Continue authentication
[+19.46s] DEBUG: Session pid=714: Authentication complete with return value 7: Authentication failure
[+19.46s] DEBUG: Authenticate result for user perard: Authentication failure
[+19.46s] DEBUG: Session pid=714: Exited with return value 1
[+19.46s] DEBUG: Seat seat0: Session stopped
[+19.47s] DEBUG: Greeter start authentication for perard
[+19.47s] DEBUG: Session pid=715: Started with service 'lightdm', username 'perard'
[+19.48s] DEBUG: Session pid=715: Got 1 message(s) from PAM
[+19.48s] DEBUG: Prompt greeter with 1 message(s)
[+23.73s] DEBUG: Continue authentication
[+26.06s] DEBUG: Session pid=715: Authentication complete with return value 7: Authentication failure
[+26.06s] DEBUG: Authenticate result for user perard: Authentication failure
[+26.06s] DEBUG: Session pid=715: Exited with return value 1
[+26.06s] DEBUG: Seat seat0: Session stopped
[+26.07s] DEBUG: Greeter start authentication for perard
[+26.07s] DEBUG: Session pid=716: Started with service 'lightdm', username 'perard'
[+26.08s] DEBUG: Session pid=716: Got 1 message(s) from PAM
[+26.08s] DEBUG: Prompt greeter with 1 message(s)
[+27.95s] DEBUG: Seat seat0 changes active session to
[+33.12s] DEBUG: Seat seat0 changes active session to c3
[+89.98s] DEBUG: Got signal 15 from process 1
[+89.98s] DEBUG: Caught Terminated signal, shutting down
[+89.98s] DEBUG: Stopping display manager
[+89.98s] DEBUG: Seat seat0: Stopping
[+89.98s] DEBUG: Seat seat0: Stopping display server
[+89.98s] DEBUG: Sending signal 15 to process 655
[+89.98s] DEBUG: Seat seat0: Stopping session
[+89.98s] DEBUG: Terminating login1 session c2
[+89.98s] DEBUG: Session pid=668: Sending SIGTERM
[+89.98s] DEBUG: Seat seat0: Stopping session
[+89.98s] DEBUG: Session pid=716: Sending SIGTERM
[+89.98s] DEBUG: Session pid=716: Terminated with signal 15
[+89.98s] DEBUG: Session: Failed during authentication
[+89.98s] DEBUG: Seat seat0: Session stopped
[+89.98s] DEBUG: Greeter closed communication channel
[+89.98s] DEBUG: Session pid=668: Exited with return value 0
[+89.98s] DEBUG: Seat seat0: Session stopped
[+90.35s] DEBUG: Process 655 exited with return value 0
[+90.35s] DEBUG: XServer 0: X server stopped
[+90.35s] DEBUG: Releasing VT 7
[+90.35s] DEBUG: XServer 0: Removing X server authority /run/lightdm/root/:0
[+90.35s] DEBUG: Seat seat0: Display server stopped
[+90.35s] DEBUG: Seat seat0: Stopped
[+90.35s] DEBUG: Display manager stopped
[+90.35s] DEBUG: Stopping daemon
[+90.35s] DEBUG: Exiting with return value 0

And i definitively use a greeter (lightdm-gtk-greeter) and I've added it to the lightdm config file as stated on the wiki.

Also, Lightdm doesn't start if I does not explicitly use

 systemctl start lightdm.service

even though I definitively did

 systemctl enable lightdm.service

Thanks again for your help, I'm definitively a Newbie when it comes to window managers, X, multiusers and stuff.

loqs

Member

Registered: 2014-03-06

Posts: 19,113

Re: Lightdm not opennig session.

[+12.04s] DEBUG: Session pid=712: Authentication complete with return value 7: Authentication failure
[+12.04s] DEBUG: Authenticate result for user perard: Authentication failure

On boot before you start lightdm manually what is the output of

systemctl status lightdm.service

Please post the contents of /etc/lightdm/lightdm.conf

McCrow

Member

Registered: 2017-08-02

Posts: 6

Re: Lightdm not opennig session.

lightdm.service - Light Display Manager
Loaded: loaded (/usr/lib/systemd/system/lightdm.service; disabled; vendor preset: disabled)
Active: inactive (dead)
Docs: man:lightdm(1) 

and here's the full lightdm.conf

 
#
# General configuration
#
# start-default-seat = True to always start one seat if none are defined in the configuration
# greeter-user = User to run greeter as
# minimum-display-number = Minimum display number to use for X servers
# minimum-vt = First VT to run displays on
# lock-memory = True to prevent memory from being paged to disk
# user-authority-in-system-dir = True if session authority should be in the system location
# guest-account-script = Script to be run to setup guest account
# logind-check-graphical = True to on start seats that are marked as graphical by logind
# log-directory = Directory to log information to
# run-directory = Directory to put running state in
# cache-directory = Directory to cache to
# sessions-directory = Directory to find sessions
# remote-sessions-directory = Directory to find remote sessions
# greeters-directory = Directory to find greeters
# backup-logs = True to move add a .old suffix to old log files when opening new ones
# dbus-service = True if LightDM provides a D-Bus service to control it
#
[LightDM]
#start-default-seat=true
#greeter-user=lightdm
#minimum-display-number=0
#minimum-vt=7 # Setting this to a value < 7 implies security issues, see FS#46799
#lock-memory=true
#user-authority-in-system-dir=false
#guest-account-script=guest-account
#logind-check-graphical=false
#log-directory=/var/log/lightdm
run-directory=/run/lightdm
#cache-directory=/var/cache/lightdm
#sessions-directory=/usr/share/lightdm/sessions:/usr/share/xsessions:/usr/share/wayland-sessions
#remote-sessions-directory=/usr/share/lightdm/remote-sessions
#greeters-directory=$XDG_DATA_DIRS/lightdm/greeters:$XDG_DATA_DIRS/xgreeters
#backup-logs=true
#dbus-service=true

#
# Seat configuration
#
# Seat configuration is matched against the seat name glob in the section, for example:
# [Seat:*] matches all seats and is applied first.
# [Seat:seat0] matches the seat named "seat0".
# [Seat:seat-thin-client*] matches all seats that have names that start with "seat-thin-client".
#
# type = Seat type (local, xremote, unity)
# pam-service = PAM service to use for login
# pam-autologin-service = PAM service to use for autologin
# pam-greeter-service = PAM service to use for greeters
# xserver-backend = X backend to use (mir)
# xserver-command = X server command to run (can also contain arguments e.g. X -special-option)
# xmir-command = Xmir server command to run (can also contain arguments e.g. Xmir -special-option)
# xserver-config = Config file to pass to X server
# xserver-layout = Layout to pass to X server
# xserver-allow-tcp = True if TCP/IP connections are allowed to this X server
# xserver-share = True if the X server is shared for both greeter and session
# xserver-hostname = Hostname of X server (only for type=xremote)
# xserver-display-number = Display number of X server (only for type=xremote)
# xdmcp-manager = XDMCP manager to connect to (implies xserver-allow-tcp=true)
# xdmcp-port = XDMCP UDP/IP port to communicate on
# xdmcp-key = Authentication key to use for XDM-AUTHENTICATION-1 (stored in keys.conf)
# unity-compositor-command = Unity compositor command to run (can also contain arguments e.g. unity-system-compositor -special-option)
# unity-compositor-timeout = Number of seconds to wait for compositor to start
# greeter-session = Session to load for greeter
# greeter-hide-users = True to hide the user list
# greeter-allow-guest = True if the greeter should show a guest login option
# greeter-show-manual-login = True if the greeter should offer a manual login option
# greeter-show-remote-login = True if the greeter should offer a remote login option
# user-session = Session to load for users
# allow-user-switching = True if allowed to switch users
# allow-guest = True if guest login is allowed
# guest-session = Session to load for guests (overrides user-session)
# session-wrapper = Wrapper script to run session with
# greeter-wrapper = Wrapper script to run greeter with
# guest-wrapper = Wrapper script to run guest sessions with
# display-setup-script = Script to run when starting a greeter session (runs as root)
# display-stopped-script = Script to run after stopping the display server (runs as root)
# greeter-setup-script = Script to run when starting a greeter (runs as root)
# session-setup-script = Script to run when starting a user session (runs as root)
# session-cleanup-script = Script to run when quitting a user session (runs as root)
# autologin-guest = True to log in as guest by default
# autologin-user = User to log in with by default (overrides autologin-guest)
# autologin-user-timeout = Number of seconds to wait before loading default user
# autologin-session = Session to load for automatic login (overrides user-session)
# autologin-in-background = True if autologin session should not be immediately activated
# exit-on-failure = True if the daemon should exit if this seat fails
#
[Seat:*]
#type=local
#pam-service=lightdm
#pam-autologin-service=lightdm-autologin
#pam-greeter-service=lightdm-greeter
#xserver-backend=
#xserver-command=X
#xmir-command=Xmir
#xserver-config=
#xserver-layout=
#xserver-allow-tcp=false
#xserver-share=true
#xserver-hostname=
#xserver-display-number=
#xdmcp-manager=
#xdmcp-port=177
#xdmcp-key=
#unity-compositor-command=unity-system-compositor
#unity-compositor-timeout=60
greeter-session=lightdm-gtk-greeter
#greeter-hide-users=false
#greeter-allow-guest=true
#greeter-show-manual-login=false
#greeter-show-remote-login=true
#user-session=default
#allow-user-switching=true
#allow-guest=true
#guest-session=
session-wrapper=/etc/lightdm/Xsession
#greeter-wrapper=
#guest-wrapper=
#display-setup-script=
#display-stopped-script=
greeter-setup-script=/usr/bin/numlockx on
#session-setup-script=
#session-cleanup-script=
#autologin-guest=false
#autologin-user=
#autologin-user-timeout=0
#autologin-in-background=false
#autologin-session=
#exit-on-failure=false

#
# XDMCP Server configuration
#
# enabled = True if XDMCP connections should be allowed
# port = UDP/IP port to listen for connections on
# listen-address = Host/address to listen for XDMCP connections (use all addresses if not present)
# key = Authentication key to use for XDM-AUTHENTICATION-1 or blank to not use authentication (stored in keys.conf)
# hostname = Hostname to report to XDMCP clients (defaults to system hostname if unset)
#
# The authentication key is a 56 bit DES key specified in hex as 0xnnnnnnnnnnnnnn. Alternatively
# it can be a word and the first 7 characters are used as the key.
#
[XDMCPServer]
#enabled=false
#port=177
#listen-address=
#key=
#hostname=

#
# VNC Server configuration
#
# enabled = True if VNC connections should be allowed
# command = Command to run Xvnc server with
# port = TCP/IP port to listen for connections on
# listen-address = Host/address to listen for VNC connections (use all addresses if not present)
# width = Width of display to use
# height = Height of display to use
# depth = Color depth of display to use
#
[VNCServer]
#enabled=false
#command=Xvnc
#port=5900
#listen-address=
#width=1024
#height=768
#depth=8

As you can see I only set the seat to use the gtk greeter and enable numlock ( as my password contains nums and my laptop always boot with nums disabled - cannot be changed in BIOS.).

I hope you can tell me what's wrong. with the authentification failure.
Thanks again.

loqs

Member

Registered: 2014-03-06

Posts: 19,113

Re: Lightdm not opennig session.

I think the password is not matching  https://bbs.archlinux.org/viewtopic.php … 8#p1460828.
Separately lightdm is showing as disabled can you try enabling the service again and post the output of the service's status after that please.

McCrow

Member

Registered: 2017-08-02

Posts: 6

Re: Lightdm not opennig session.

Sorry for the long wait, I was away from my PC for days.

I think the password is not matching  https://bbs.archlinux.org/viewtopic.php … 8#p1460828.
Separately lightdm is showing as disabled can you try enabling the service again and post the output of the service's status after that please.

I've figured out the fact that even though it shows "fr" as the layout it's still "en". Pretty sure it's a bug that's fixed on other distros that distribute lightdm.

I've tried enabling it with the "--force" option. still disabled. What on Earth can cause that ?

Thanks a lot by the way.

McCrow

Member

Registered: 2017-08-02

Posts: 6

Re: Lightdm not opennig session.

A lot of things seems off with my arch install.
I've tried replacing lightdm by sddm andd the same problem happens. the the dm is not starting by itself. does anyone has an idea on why ? I'm ready to purge config files to get that done, but i haven't tweaked anything prior to this bug.

If anyone hass ideas, please, do tell.

McCrow

Member

Registered: 2017-08-02

Posts: 6

Re: Lightdm not opennig session.

I've found the Problem !!!!
I'm so happy. I kinda searched why my system booted always as multi-user, despite system-d defaults. it was grub fault all the time ! modified Grub defaults and grub-mkconfig , and it works.