Kdm session manager

[Luca]

Hi!

I have installed kde-3.5.4, xfce4, metacity, gnome-2.14.2 and
gnome-2.16.0 and I use kdm as login manager. I created the desktop files
for the sessions but I am unable to start gnome-2.16.0.
Kde-3.5.4 is installed in /opt/kde-3.5.4 with a symlink /opt/kde
pointing to it, gnome-2.14.2 is installed in /opt/gnome-2.14.2 with a
symlink /opt/gnome pointing to it, gnome-2.16.0 is installed in
/opt/gnome-2.16.0, xfce4 is installed in /usr and metacity is installed
in /usr.

Since I use to launch dbus-daemon with gnome my gnome-xxx desktop files
looks so:
gnome-dbus.desktop
[Desktop Entry]
Encoding=UTF-8
Name=GNOME with D-BUS
Comment=GNOME Desktop with D-BUS support
Exec=dbus-launch --exit-with-session gnome-session
TryExec=/usr/bin/dbus-launch
Icon=
Type=Application

gnome-2.16.0-dbus.desktop
[Desktop Entry]
Encoding=UTF-8
Name=GNOME 2.16.0 with D-BUS
Comment=GNOME 2.16.0 Desktop with D-BUS support
Exec=dbus-launch --exit-with-session /opt/gnome-2.16.0/bin/gnome-session
TryExec=/usr/bin/dbus-launch
Icon=
Type=Application

How do I manage to start the different sessions?
I also tried to modify /opt/kde-3.5.4/share/config/kdm/Xsession in this way:
case $session in
  "")
    exec xmessage -center -buttons OK:0 -default OK "Sorry,
$DESKTOP_SESSION is no valid session."
    ;;
  failsafe)
    exec xterm -geometry 80x24-0-0
    ;;
  custom)
    exec $HOME/.xsession
    ;;
  default)
    exec /opt/kde-3.5.4/bin/startkde
    ;;
  Gnome-2.14.2)
    export BINDIR=/opt/gnome-2.14.2/sbin
    export HOME=$HOME/.gnome-2.14.2
    export SBINDIR=/opt/gnome-2.14.2/sbin
    export LIBEXECDIR=/opt/gnome-2.14.2/lib/gdm
    export PATH=/bin:/usr/bin:/usr/X11R7/bin:$GNOMEDIR
    exec /opt/gnome-2.14.2/bin/gnome-session
    ;;
  Gnome-2.16.0)
    export BINDIR=/opt/gnome-2.16.0/sbin
    export HOME=$HOME/.gnome-2.16.0
    export SBINDIR=/opt/gnome-2.16.0/sbin
    export LIBEXECDIR=/opt/gnome-2.16.0/lib/gdm
    export PATH=/bin:/usr/bin:/usr/X11R7/bin:$GNOMEDIR
    exec /opt/gnome-2.16.0/bin/gnome-session
    ;;
  *)
    eval exec "$session"
    ;;
esac
exec xmessage -center -buttons OK:0 -default OK "Sorry, cannot execute
$session. Check $DESKTOP_SESSION.desktop."

Still I am unable to start gnome-2.16.0, and just a note when I start
gnome-2.14.2 it seems to load in background some things of gnome-2.16.0,
I have two trash icons.

Thanks,
Luca

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