Comment 54 for bug 1205384

A fixed package will be available in https://launchpad.net/~lubuntu-dev/+archive/staging

The fix is based on the script Jarno Suni submitted. It re-install xscreensaver by default, but only start it when you launch lxlock. It also removes the lightdm method for locking the screen. Please test it and report back if it's working for you.