Elbennit, please type xscreensaver -nosplash & in terminal. Is there some output? If not, try xscreensaver-command -nosplash in terminal. Does it lock successfully or does it output some error?
Elbennit, please type command -nosplash
xscreensaver -nosplash &
in terminal. Is there some output? If not, try
xscreensaver-
in terminal. Does it lock successfully or does it output some error?