If you are one of the users who finally decided to install the KDE desktop on our beloved Ubuntu April 12, You may have been able to check that in addition to the out of control which has been created on our desktop, especially in the list of applications, which is not a comfortable or functional desktop.
In addition to that we have also changed the login screen by a horrible dull gray screen and with very little grace.
In the next tutorial I will teach them to how to uninstall completely this linux desktop, and leave no trace of it in ours Ubuntu April 12.
per uninstall the KDE desktop of our team, we will open a new terminal and type the following line:
- sudo apt-get remove -purge kubuntu-desktop kde-standard language-pack-kde-ca
With this line, we will have completely removed the KDE desktop of our operating system, but if we restart the computer, we can see how we continue to install both the splash of KDE such as the login screen or user management.
To uninstall this completely and go back to Ubuntu’s own April 12, In a terminal we will type the following:
- sudo dpkg-reconfigure gdm
If you get an error message saying that GDM is not installed, we will install it with this line:
We will give OK and select the option GDM which is the own of Ubuntu April 12.
Now we will recover the plymouth own of Ubuntu typing:
- sudo update-alternatives -config default.plymouth

we will select the Ubuntu logo which in this case is option number 2:
Now we will only have that recover the Ubuntu splash April 12, And we will do it from the terminal and typing the following line:
- sudo update-alternatives -config usplash-artwork.so
If it happens to you like me and you report an error or there are no options to change, we will run the next one from the terminal itself
- sudo apt-get install plymouth-theme
- sudo apt-get install galternatives

With these two lines we will have installed a graphic manager to make the choice of the splash easier, to open it we will only have to go to Applications – system tools – alternatives.
Now we will look Default.plymouth and we will select the option «/Lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth»
Now we will have ours Ubuntu April 12 as we had it before all this mess of installing the desktop KDE.
More information – How to install KDE desktop on Ubuntu April 12