Splash screen not showing during boot in Ubuntu 16.04 but works fine while shut down

I have installed Macbuntu 16.04 transformation pack on my Ubuntu. The splash screen (or boot screen) does not show up during boot. It just shows a black screen and then the lightdm-webkit-greeter comes up. But during shut down it works fine.

I tried to reconfigure it. So in terminal I typed:

sudo update-alternatives --config default.plymouth

which showed:

There are 4 choices for the alternative default.plymouth (providing /usr/share/plymouth/themes/default.plymouth).

  Selection    Path                                                                 Priority   Status
------------------------------------------------------------
  0            /usr/share/plymouth/themes/macbuntu/macbuntu.plymouth                 100       auto mode
* 1            /usr/share/plymouth/themes/macbuntu/macbuntu.plymouth                 100       manual mode

  2            /usr/share/plymouth/themes/spinner/spinner.plymouth                   70        manual mode
  3            /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo-scale-2.plymouth   99        manual mode
  4            /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth           100       manual mode

Press  to keep the current choice[*], or type selection number: 1

and then the prompt appears without any error.

Then I typed :

sudo update-initramfs -u

which resulted in:

update-initramfs: Generating /boot/initrd.img-4.13.0-37-generic

and then again the user prompt comes up without any error.

When I reboot, it does not show the boot screen while booting up.