sudo apt-get purge light-locker
sudo apt-get install xscreensaver
# To make the "switch users" button know that you use lightdm:
echo 'xscreensaver.newLoginCommand: dm-tool switch-to-greeter' >> ~/.Xresources
The downside is that you have to enter your password twice when you do "switch users" to an already logged-in user.
For those on XFCE, gnome-screensaver won't lock on idle – it requires gnome-session running in order to do that: https:/ /bugzilla. xfce.org/ show_bug. cgi?id= 5927
A more permanent "solution" for XFCE users is to
sudo apt-get purge light-locker newLoginCommand : dm-tool switch-to-greeter' >> ~/.Xresources
sudo apt-get install xscreensaver
# To make the "switch users" button know that you use lightdm:
echo 'xscreensaver.
The downside is that you have to enter your password twice when you do "switch users" to an already logged-in user.