The splash screen is shown when you boot up ubuntu. You can stop showing it and display lot of details about your boot process as below.
Run gedit in sudo mode and edit the file /etc/default/grub
sudo gedit /etc/default/grub
Locate the line that shows the following
Remove quiet and splash
Then save and close out of your editor
Run the following command to update grub.
This may take a couple of minutes with out any visible feedback. You will come back to bash prompt eventually.
After the previous command is finished you should be able to reboot and when you boot up you will have a verbose boot with out a splash screen. You can experiment with “splash” alone removed from the config file.