I have also tried following these commands:

```
update-alternatives --display default.plymouth
sudo update-alternatives --config default.plymouth
sudo update-initramfs -u

```

and these:

```
sudo rm /etc/alternatives/default.plymouth
sudo ln -s /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth /etc/alternatives/default.plymouth

```

I have also found a wonderful boot animation (Earth-sunrise link <http://www.istitutomajorana.it/scarica2/Animazione-Plus8.tar.gz>) with a script inside with these commands:

```
sudo cp -R ~/Animazione-Plus8/Earth-sunrise/ /lib/plymouth/themes/
sudo update-alternatives --install /lib/plymouth/themes/default.plymouth default.plymouth /lib/plymouth/themes/Earth-sunrise/Earth-sunrise.plymouth 100
sudo update-alternatives --config default.plymouth
sudo update-initramfs -u

```

after all the default kubuntu logo didn't change, so I removed all alternatives with this:

```
sudo update-alternatives --remove-all default.plymouth
sudo update-initramfs -u

```

but I still have the same logo. I think it's a kde situation.
So how can I change that boot animation with that one I got (Earth-sunrise.plymouth)?

**edit**:
it doesn't work for real during ubuntu boot , only virtual boot animation works:/ I have followed all the steps but nothing has changed in boot animation.

I don't know maybe my problem is with ATI driver I have or with grub settings. What is the right configuration of grub I should have? I have also grub customizer installed in my distro maybe I have to change something.
this is my /etc/default/grub if it helps: <http://paste.ubuntu.com/1587147/>

Right now I don't have now boot animation, there only a black screen with some text.

**edit2:**
Ok I found my problem, it's about my gpu (msi 6870 Hawk) and the proprietary ati drivers:
I unistalled old 12.8 (even with those the plymouth animation was not working) because I wanted to update my drivers and while I was with open drivers I finally saw the animation on boot, the problem is that I need ati driver and I had to install new 13.1 and infact now plymoth animation doesn't work any more.
So is there a way to solve the problem, now that I found what it is about?
Thanks