I have upgraded my Ubuntu 16.04 to 20.04 and have installed Xfce which I'd like to set as the default DE when logging into my system. However, everytime I login with Xfce and logout, Ubuntu forgets Xfce as the default DE and goes back to the option Ubuntu (Unity).
Following How do I set the default desktop environment on 18.04 (Bionic)?
I tried
sudo update-alternatives --config x-session-manager
in the terminal. However, what I get is
There are 3 choices for the alternative x-session-manager (providing /usr/bin/x-session-manager).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/gnome-session 50 auto mode
1 /usr/bin/gnome-session 50 manual mode
2 /usr/bin/startxfce4 50 manual mode
* 3 /usr/bin/xfce4-session 40 manual mode
Press <enter> to keep the current choice[*], or type selection number:
which apparently indicates that Xfce should be the default DE which is not the case. Any help would be appreciated.