Comment 30 for bug 1205384

Actually, xscreensaver does not need to start at startup; the daemon can be started within lxlock, if needed. But xscreensaver needs to be installed, of course. I wrote a replacement script for lxlock that tries to lock by xscreensaver; see the attachement for more details.

Still, there is a problem with how lxlock is used by e.g. the suspend function of the Logout Lubuntu dialog: It runs lxlock in background and does not check, if it ran successfully before entering the suspend mode, see Bug #1054299