no window manager after ubuntu upgrade

[Ulli Horlacher]

I have a ubuntu system with gnome and xfce installed, because I have
different users with different preferences.

I did an upgrade from 7.10 to 8.04.1.

The system is comming up and gnome works flawlessly, but when I login to a
xfce-session (my personally preferred one), there is no window-manager:
xfce starts and I have the menus at the top and the bottom of the screen.
But no window has a frame, there is no window-decoration with title and
buttons. So I cannot move or resize any window. Also missing is the 
right-click-at-background-menu.


I suppose one of the xfce (sub-)programs is missing, but which one (and why?)?

After login I have the following xfce processes:

USER       PID  PPID %CPU    VSZ COMMAND
framstag  8246  8243  0.0  43400 /usr/lib/xfce4/panel-plugins/xfce4-menu-plugin socket_id 18874408 name xfce4-menu id 1 display_name Xfce Menu size 34 screen_position 1
framstag  8240     1  0.0  19876 xfce-mcs-manager
framstag  8235  8077  0.0  22340 /usr/bin/xfce4-session
framstag  8077  6866  0.0   1772 /bin/sh /etc/xdg/xfce4/xinitrc -- /etc/X11/xinit/xserverrc
framstag  8243  8235  0.0  43724 xfce4-panel --sm-client-id 117f000101000118426508500000061020001 --display :0.0
framstag  8212  8077  0.0  21624 /usr/bin/seahorse-agent --execute startxfce4


-- 
Ullrich Horlacher              Server- und Arbeitsplatzsysteme
Rechenzentrum                  E-Mail: horlacher at rus.uni-stuttgart.de
Universitaet Stuttgart         Tel:    ++49-711-685-65868
Allmandring 30                 Fax:    ++49-711-682357
70550 Stuttgart (Germany)      WWW:    http://www.rus.uni-stuttgart.de/