И снова Xfce 4.8 и снова выключение и перезагрузка

slim.conf:

# Path, X server and arguments (if needed)
# Note: -xauth $authfile is automatically appended
default_path        /bin:/usr/bin:/usr/local/bin
default_xserver     /usr/bin/X
xserver_arguments   -nolisten tcp -br -deferglyphs 16

# Commands for halt, login, etc.
halt_cmd            /sbin/shutdown -h now
reboot_cmd          /sbin/shutdown -r now
console_cmd         /usr/bin/xterm -C -fg white -bg black +sb -T "Console login" -e /bin/sh -c "/bin/cat /etc/issue; exec /bin/login"
#suspend_cmd        /usr/sbin/suspend

# Full path to the xauth binary
xauth_path         /usr/bin/xauth 

# Xauth file for server
authfile           /var/run/slim.auth


# Activate numlock when slim starts. Valid values: on|off
numlock             off

# Hide the mouse cursor (note: does not work with some WMs).
# Valid values: true|false
# hidecursor          false

# This command is executed after a succesful login.
# you can place the %session and %theme variables
# to handle launching of specific commands in .xinitrc
# depending of chosen session and slim theme
#
# NOTE: if your system does not have bash you need
# to adjust the command according to your preferred shell,
# i.e. for freebsd use:
# login_cmd           exec /bin/sh - ~/.xinitrc %session
# login_cmd           exec /bin/bash -login ~/.xinitrc %session
#login_cmd           exec /bin/bash -login /usr/share/slim/Xsession %session
login_cmd exec ck-launch-session /bin/bash -login /usr/share/slim/Xsession %session

# Commands executed when starting and exiting a session.
# They can be used for registering a X11 session with
# sessreg. You can use the %user variable
#
# sessionstart_cmd	some command
# sessionstop_cmd	some command
sessionstart_cmd	/usr/bin/sessreg -a -l :0.0 %user
sessionstop_cmd     /usr/bin/sessreg -d -l :0.0 %user

# Start in daemon mode. Valid values: yes | no
# Note that this can be overriden by the command line
# options "-d" and "-nodaemon"
daemon	yes

# Available sessions (first one is the default).
# The current chosen session name is replaced in the login_cmd
# above, so your login command can handle different sessions.
# see the xinitrc.sample file shipped with slim sources
#sessions            xfce4,icewm,wmaker,blackbox
# Alternatively, read available sessions from a directory:
sessiondir           /etc/X11/Sessions

# Executed when pressing F11 (requires media-gfx/imagemagick for import)
# Alternative is media-gfx/scrot. See Gentoo bug 252241 for more info.
screenshot_cmd      import -window root /slim.png
#screenshot_cmd      scrot /root/slim.png

# welcome message. Available variables: %host, %domain
welcome_msg         Welcome to %host

# Session message. Prepended to the session name when pressing F1
# session_msg         Session: 

# shutdown / reboot messages
shutdown_msg       The system is halting...
reboot_msg         The system is rebooting...

# default user, leave blank or remove this line
# for avoid pre-loading the username.
#default_user        simone

# Focus the password field on start when default_user is set
# Set to "yes" to enable this feature
#focus_password      no

# Automatically login the default user (without entering
# the password. Set to "yes" to enable this feature
#auto_login          no


# current theme, use comma separated list to specify a set to 
# randomly choose from
current_theme       slim-gentoo-simple

# Lock file, /etc/init.d/xdm expects slim.pid
lockfile            /var/run/slim.pid

# Log file
logfile             /var/log/slim.log

при замене

login_cmd exec ck-launch-session /bin/bash -login /usr/share/slim/Xsession %session

на

login_cmd           exec /bin/bash -login /usr/share/slim/Xsession %session

кнопки выключения и перезагрузки становятся неактивными.

команды

dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit /org/freedesktop/ConsoleKit/Manager org.freedesktop.ConsoleKit.Manager.Stop

и

dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit /org/freedesktop/ConsoleKit/Manager org.freedesktop.ConsoleKit.Manager.Restart

работают и приводят к нужному результату (лептоп выключается и перезагружается).