root@kali:~# update-alternatives --config x-session-manager
There are 2 choices for the alternative x-session-manager (providing /usr/bin/x-session-manager).
Selection Path Priority Status
0 /usr/bin/startxfce4 50 auto mode
1 /usr/bin/startxfce4 50 manual mode
2 /usr/bin/xfce4-session 40 manual mode
Press to keep the current choice[zxsq-anti-bbcode-*], or type selection
number: 3