This worked for me on that issue
You need to delete the "splash" entry in the grub menu. It helped me.
in terminal:
Code:
sudo pluma /etc/default/grub
Remove "splash" entry,save: Ctrl+o Enter,Ctrl+x and
sudo update-grub
Also helped, I am running xubuntu 20.04
Code:
sudo apt-get purge xfce4-screensaver