What to do if a white screen appears with a cursor on boot?

Question

ubuntu

Just a white screen with a cursor. If you move the cursor, it will change, as if there is something there. Ctrl + alt + del is solved, then it throws it onto the screen for entering the profile (but in order for it to be displayed, you need to move the cursor or just a black screen). In addition to the white screen, Firefox and Atril (PDF viewer) are launched. In autoloading applications, neither one nor the other is worth it. Native proprietary driver (from nvidia-390.48).

Answer 1

watch journalctl
does not start the graphical shell, etc.