

You'd also have to do the above except instead of xautolock you could use gnome-screensaver.
#Fedora 23 disable xscreensaver install
If you did want this single interface, you'd need to install the screensaver as well. ¹ …which is not included with gdm3, so you didn't install another lock mechanism. to actually work under any conditions as a locker. This is arguably a much wiser solution as xscreensaver is really notable for its commitment to security, i.e. Since your primary issue is looks, You might want to look into theming xscreensaver's lock dialog.

Technically that's not a locker, so you'd need something else. Luckily, there are others that take precedence over xscreensaver, including the one that trumps them all: xautolock. This tool generally chooses the screensaver based on the desktop environment but xscreensaver takes precedence so that eliminates some other options, including gnome-screensaver¹. LXQt uses xdg-screensaver lock to handle locking.
