I installed Ubuntu Server with xfce and slim from official repos and I have problem with maintaining session - to be precise, when xfce is starting, for some reason it overrides session settings resulting in inability to shutdown or reboot computer and to mount devices. What is most suprising, if i click on shutdown button on xfce upper panel during its startup, I am able to see shutdown menu with all options available (and - suprisingly - they are working), but after a few more seconds (after desktop icons show up), I am unable to do so again (reboot and shutdown icons greyed out). My user is in correct groups (powerdev and plugdev). I was unable to find good solution so far...
Those are my config files:
# Path, X server and arguments (if needed)# Note: -xauth $authfile is automatically appended
xserver_arguments -nolisten tcp
# 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.net; exec /bin/login"
# Full path to the xauth binary
# Xauth file for server
# Activate numlock when slim starts. Valid values: on|off
# numlock on
# 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 ck-launch-session /bin/bash -login /etc/X11/Xsession %session
#login_cmd exec /bin/bash -login ~/.xinitrc %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
# Start in daemon mode. Valid values: yes | no
# Note that this can be overriden by the command line
# options "-d" and "-nodaemon"
# 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
# Executed when pressing F11 (requires imagemagick)
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.
# Focus the password field on start when default_user is set
# Set to "yes" to enable this feature
# Automatically login the default user (without entering
# the password. Set to "yes" to enable this feature
# current theme, use comma separated list to specify a set to
# randomly choose from
# Lock file
# Log file
exec dbus-launch --exit-with-session startxfce4