This is a dorky question and the merits of it are pointless. I have a system for guests and I want a BSOD screensaver for the login. I've been fiddling around for a while with various attempts at making it happen.The system runs Debian Jessie.What I tried at least got the xscreensaver-demo window running when lightdm starts. The daemon will not start. If someone can help me get the daemon to start it will be a step in the right direction. In fact, all my problems should be solved.At this point I've not cared about security implications. I found I can have a script for the greeter by adding this line to /etc/lightdm.conf:[SeatDefaults]greeter-setup-script=/etc/lightdm/xscreensaver-script.shThe script simply was this, so I could get xscreensaver-demo to run and bootstrap what I want. It says this greeter setup script runs as root, and just having the script run xscreensaver-demo did create a window. However, it could not start the xscreensaver daemon.I then tried running xscreensaver-demo as lightdm with this with my script:su -l lightdm -c /usr/bin/xscreensaver-demo &At that point nothing happened, and I am running out of ideas and bad hacks to attempt this. I honestly don't understand lightdm very well, but I still think this can be done.Note: I am trying to get xscreensaver-demo running so I can select a screensaver, after that the greeter can just run with xscreensaver.I've considered adding a window manager to the greeter, but twm is all that came to mind and manually placing all the windows lightdm makes it pretty silly.
xscreensaver running on lightdm GTK greeter
lightdm;xscreensaver