Ubuntu!

You can disable the splash screen and instead view details about your boot process by following the next steps:
1. Edit grub

sudo vi /etc/default/grub

2. Locate the following line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

and remove quiet and splash.
After that, the line should look like this:

GRUB_CMDLINE_LINUX_DEFAULT=""

3. Save and exit.

:wq

4. Now update the grub:

sudo update-grub

That’s it!