[Pkg-xfce-devel] Bug#672686: lightdm: errors during uninstall and fails to load after reinstall

Marco Milone marco.sting at gmail.com
Sat May 12 20:30:42 UTC 2012

Package: lightdm
Version: 1.0.11-1
Severity: normal

Dear Maintainer,

   * What led up to the situation?

I tried to uninstall lighdm from my system but the process gave me this error:

(Lettura del database... 202102 file e directory attualmente installati.)
Rimozione di lightdm...
Eliminazione dei file di configurazione di lightdm...
Rimozione dell'utente «lightdm» ...
Attenzione: il gruppo «lightdm» non ha alcun membro.
/usr/sbin/deluser: «/usr/sbin/userdel lightdm» uscito a causa del segnale 11.
dpkg: errore nell'elaborare lightdm (--purge):
il sottoprocesso vecchio script di post-removal ha restituito lo stato di
errore 1
configured to not write apport reports
Si sono verificati degli errori nell'elaborazione:
localepurge: Disk space freed in /usr/share/locale: 0 KiB
localepurge: Disk space freed in /usr/share/man: 0 KiB
localepurge: Disk space freed in /usr/share/gnome/help: 0 KiB
localepurge: Disk space freed in /usr/share/omf: 0 KiB

Total disk space freed by localepurge: 0 KiB

E: Sub-process /usr/bin/dpkg returned an error code (1)
Errore durante l'installazione di un pacchetto. Tentativo di ripristino:

   * What exactly did you do (or not do) that was effective (or

Then I tried to reinstall it and all seems to work, but when I restarted my
system, lightdm fails to load the greeter and left me with a blank screen with
a blinkin cursor in the top left corner of the screen

I also tried a dpkg-reconfigure lightdm, no errors reported but no success.

This is the content of /var/log/lightdm:

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.0.11, UID=0 PID=2111
[+0.00s] DEBUG: Loaded configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.03s] DEBUG: Registered seat module xlocal
[+0.03s] DEBUG: Registered seat module xremote
[+0.03s] DEBUG: Adding default seat
[+0.03s] DEBUG: Starting seat
[+0.03s] DEBUG: Starting new display for greeter
[+0.03s] DEBUG: Starting local X display
[+0.03s] DEBUG: Could not run plymouth --ping: Failed to execute child process
"plymouth" (No such file or directory)
[+0.03s] DEBUG: Using VT 7
[+0.03s] DEBUG: Activating VT 7
[+0.03s] DEBUG: Logging to /var/log/lightdm/x-0.log
[+0.20s] DEBUG: Writing X server authority to /var/run/lightdm/root/:0
[+0.20s] DEBUG: Launching X Server
[+0.20s] DEBUG: Launching process 2156: /usr/bin/X :0 -auth
/var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.20s] DEBUG: Waiting for ready signal from X server :0
[+0.20s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.20s] DEBUG: Registering seat with bus path
[+4.57s] DEBUG: Got signal 10 from process 2156
[+4.57s] DEBUG: Got signal from X server :0
[+4.57s] DEBUG: Connecting to XServer :0
[+4.57s] DEBUG: Starting greeter session
[+5.41s] DEBUG: pam_start("lightdm", "lightdm") -> (0xb85c7f08, 0)
[+5.41s] DEBUG: Starting session lightdm-greeter as user lightdm
[+5.56s] DEBUG: Logging to /var/log/lightdm/x-0-greeter.log
[+5.56s] DEBUG: Launching session
[+5.57s] DEBUG: pam_set_item(0xb85c7f08, 3, ":0") -> 0 (Success)
[+5.65s] DEBUG: pam_open_session(0xb85c7f08, 0) -> 0 (Success)
[+6.25s] DEBUG: Opened ConsoleKit session
[+6.25s] DEBUG: Dropping privileges to uid 109
[+6.25s] DEBUG: Adding session authority to /var/lib/lightdm/.Xauthority
[+6.25s] DEBUG: Restoring privileges
[+6.25s] WARNING: Failed to write authority: Error opening file
'/var/lib/lightdm/.Xauthority': No such file or directory
[+6.25s] DEBUG: Failed to start greeter
[+6.25s] DEBUG: Failed to start greeter
[+6.25s] DEBUG: Stopping display
[+6.25s] DEBUG: Sending signal 15 to process 2156
[+6.25s] DEBUG: Dropping privileges to uid 109
[+6.25s] DEBUG: Removing session authority from /var/lib/lightdm/.Xauthority
[+6.25s] DEBUG: Restoring privileges
[+6.25s] DEBUG: Greeter closed communication channel
[+6.70s] DEBUG: Process 2156 exited with return value 0
[+6.70s] DEBUG: X server stopped
[+6.70s] DEBUG: Removing X server authority /var/run/lightdm/root/:0
[+6.70s] DEBUG: Releasing VT 7
[+6.70s] DEBUG: Display server stopped
[+6.70s] DEBUG: Display stopped
[+6.70s] DEBUG: Stopping X local seat, failed to start a display
[+6.70s] DEBUG: Stopping seat
[+6.70s] DEBUG: Seat stopped
[+6.70s] DEBUG: Required seat has stopped
[+6.70s] DEBUG: Stopping display manager
[+6.70s] DEBUG: Display manager stopped
[+6.70s] DEBUG: Stopping daemon
[+6.71s] DEBUG: Exiting with return value 1

Feel free to ask me any other information,

best regards

Marco Milone

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-2-686-pae (SMP w/4 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lightdm depends on:
ii  adduser                3.113+nmu1
ii  consolekit             0.4.5-3
ii  dbus                   1.5.12-1
ii  debconf [debconf-2.0]  1.5.42
ii  libc6                  2.13-32
ii  libglib2.0-0           2.32.0-4
ii  libpam0g               1.1.3-7
ii  libxcb1                1.8.1-1
ii  libxdmcp6              1:1.1.1-1
ii  lightdm-gtk-greeter    1.0.11-1

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.6+12

Versions of packages lightdm suggests:
ii  accountsservice  0.6.15-4

-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: slim

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