Logout and login - there is no options to choose KDE

How to do this?
If I logout and login - there is no options to choose KDE.
Also if I open settings > Details > Users - there is no option to choose KDE

I have followed the tutorial, everything was installed without errors, during reboot ubuntu logo changed with kubuntu, but it still logins to GNOME :frowning:

First make sure that the sddm is installed on your system. Most likely it is already but just in case run:

$ sudo apt install sddm

If the sddm is already installed than try to reconfigure it in order to make sddm the default display manager:

$ sudo dpkg-reconfigure sddm

This will ask you to choose your default display manager. Select sddm:

Confirm that sddm is selected as default:

$ cat /etc/X11/default-display-manager

The easiest now is to simply reboot your Ubuntu system and make sure that you have selected Plasma desktop as a default desktop environment:

Hope this helps…