Does it work better with nvidia driver?
You could use another locker in 18.10 as workaround. See contents of /usr/bin/xflock4 script for hint. (You have to kill light-locker process and make it not start in "Session and Startup" dialog.
Does it work better with nvidia driver?
You could use another locker in 18.10 as workaround. See contents of /usr/bin/xflock4 script for hint. (You have to kill light-locker process and make it not start in "Session and Startup" dialog.