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I'am running a 64 bit version of Ubuntu 12.04 LTS on a Sony Vaio with 8GB of ram & 500Gb HDD.

I had recently installed the Lubuntu and KDE desktop environments but was not very impressed with either of them so I removed them both and went back to choosing between Unity and Gnome.

However, when I boot my computer am getting the blue Lubuntu splash screen instead of the regular default 12.04 unity screen.

How can I get rid of this Lubuntu splash screen?

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The boot splash screen is provided by the plymouth program, with the default theme set using the packaging system's alternatives system.

There are two ways you can change back to the default splash screen:

  1. Configure the alternatives:

    sudo update-alternatives --config default.plymouth
    sudo update-alternatives --config text.plymouth
  2. Uninstall the theme packages from the other Ubuntu variants. Ones to look for based on what you've described include:

    • plymouth-theme-kubuntu-logo
    • plymouth-theme-kubuntu-text
    • plymouth-theme-lubuntu-logo
    • plymouth-theme-lubuntu-text

    When removing these, be careful to check whether removing the package will cause anything else you care about to be removed.

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thanks for the first method.. it's saved me.. – Ahmad Azwar Anas Nov 4 '13 at 4:21

Just remove the plymouth themes :

sudo apt-get remove plymouth-theme-lubuntu-logo
sudo apt-get remove plymouth-theme-lubuntu-text

Now the default themes should link to the ones of Ubuntu :

$ ls -lrt /etc/alternatives/*.plymouth
lrwxrwxrwx 1 root root 53 sept. 21 01:32 /etc/alternatives/default.plymouth -> /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
lrwxrwxrwx 1 root root 53 sept. 21 01:33 /etc/alternatives/text.plymouth -> /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
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