After having trouble with my python I had to reinstall my LXDE with
apt-get install task-lxde-desktop
All my settings remained working except one I don't know if it depends on the reinstallation or a setting I have to make.
LXDE has its own login screen on startup. Before the reinstallation I had a shortcut on my suspend key to invoke
lxlock and I had the login screen again.
After the reinstallation I have the same shortcut remaining but I see this aweful login screen from
xscreensaver which I'm not able to get rid of.
xscreensaver settings are strict deactivated. I don't need the screensaver.
So how to get rid of the XScreenSaver login and go to the LXDE login?
I don't want to remove the XScreenSaver package, while this causes
lxlock to be removed too. I just wan't to change the login screen displayed. Remove XScreensaver login and show the LXDE startup login instead.
Additionally I found out that the menu
Logout / Screen Lock causes the same login screen. So it's a generally configuration somewhere on my system I have to find and to alterate.
Edit ( 2017-12-19)
After diggin' around I found out I was wrong with the assumption
lxlock will be removed with
xscreensaver. So I did what @ipor-sircer mentioned and removed
man lxlock shows that lxlock invokes
light-locker xscreensaver gnome-screensaver slock xlock i3lock
in the shown order.
After the removal of
xscreensaver nothing happens while invoking
lxlock. I found out, that
light-locker is the only package installed. But I didn't manage to get it running manually.