Torsten, you could also view the downloaded script to get idea of alternative lockers, if you don't want to use xscreensaver. I think xfce4-power-manger works with all those alternatives, if you trick it to find xflock4, which is counterpart of lxlock in Xfce:
Torsten, you could also view the downloaded script to get idea of alternative lockers, if you don't want to use xscreensaver. I think xfce4-power-manger works with all those alternatives, if you trick it to find xflock4, which is counterpart of lxlock in Xfce:
sudo ln -s -T /usr/local/ bin/lxlock /usr/local/ bin/xflock4
(Maybe you don't need to do it, if you have xfce4-session installed; then the power manager uses /usr/bin/xflock4 that comes with the package.)