my 1st lightdm.conf

#
# General configuration
#
# xserver = X server to run (FIXME)
# default-xserver-command = Default X server command (FIXME)
# authorization-directory = Directory to store X authorization files
# log-directory = Directory to log information to
# theme-directory = Directory to load themes from
# theme-engine-directory = Directory to load theme engines from
# default-greeter-theme = Default greeter theme to use
# cache-directory = Directory to cache to
# xsessions-directory = Directory to find X sessions
# default-xsession Default X session to use
# session-wrapper = Program to run sessions through
# minimum-vt = First VT to run displays on
# seats = list of seats to start displays on
#
[LightDM]
#xserver=default-xserver
#default-xserver-command=
authorization-directory=/var/cache/lightdm/authority
log-directory=/var/log/lightdm
theme-directory=/usr/share/lightdm/themes
theme-engine-directory=/usr/libexec/lightdm
default-greeter-theme=example-gtk-gnome
cache-directory=/var/cache/lightdm
xsessions-directory=/usr/share/xsessions
#default-xsession=
session-wrapper=/etc/lightdm/Xsession
minimum-vt=7
seats=seat-0 seat-1

#
# X server configuration
# layout = ServerLayout to use
# config-file = Configuration file to use
#
#[default-xserver]
#command=/usr/bin/X
#layout=
#config-file=

#
# Seat configuration
#
# vt = Virtual terminal to start on (0-n)
# greeter-theme = Greeter theme
# greeter-user = User to run greeter process as
# session = Default session
# default-user = Username of default user to log in as
# default-user-timeout = Delay before logging in in seconds (use 0 for automatic login)
# pam-service = PAM service to use
# display-number = Display number to use (overrides automatic display number selection)
# xserver = X server to use
# xdmcp-manager = XDMCP manager to connect to
# xdmcp-port = XDMCP UDP/IP port to communicate on
# key = Authentication key to use
#
[seat-0]
vt=7
greeter-theme=example-gtk-gnome
#greeter-user=lightdm
session=gnome
#default-user=bob
#default-user-timeout=5
#default-user-session=
#pam-service=lightdm
#display-number=2
xserver=/usr/bin/X -layout Desktop
#xdmcp-manager=
#xdmcp-port=177
#key=0x0123456789ABCD
#
[seat-1]
vt=2
greeter-theme=example-gtk-gnome
#greeter-user=lightdm
session=gnome
#default-user=bob
#default-user-timeout=5
#default-user-session=
#pam-service=lightdm
#display-number=2
xserver=/usr/bin/X -sharevts -Media Desktop
#xdmcp-manager=
#xdmcp-port=177
#key=0x0123456789ABCD

#
# User manager configuration
#
# load-users = true if can provide user list to greeter
# minimum-uid = Minimum UID required to be shown in greeter
# hidden-users = Users that are not shown to the user
# hidden-shells = Shells that indicate a user cannot login
#
[UserManager]
#load-users=true
#minimum-uid=500
#hidden-users=nobody nobody4 noaccess
#hidden-shells=/bin/false /usr/sbin/nologin

#
# Guest account configuration
#
# enabled = true if guest account is enabled
# username = username of guest account
# setup-script = script to be run to setup guest account
# cleanup-script = script to be run to cleanup guest account
#
[GuestAccount]
enabled=false
username=guest
setup-script=/usr/share/lightdm/guest-session/guest-session-setup.sh
cleanup-script=/usr/share/lightdm/guest-session/guest-session-cleanup.sh

#
# XDMCP Server configuration
#
# enabled = true if XDMCP connections should be allowed
# port = UDP/IP port to listen for connections on
# key = Authentication key to use for XDM-AUTHENTICATION-1 or blank to not use authentication
#
# 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.
#
[xdmcp]
#enabled=true
#port=177
#key=0x0123456789ABCD