Today I’ve updated Xubuntu to the 14.04 LTS release. The process almost worked without flaws. Almost, because after rebooting, xfce did not start anymore.

As you may know, Ubuntu 14 comes with lightdm, so I’ve opened /var/log/lightdm/lightdm.log and I’ve found the following:

[+0.01s] DEBUG: Seat: Failed to find session configuration unity-greeter
[+0.01s] DEBUG: Seat: Failed to create greeter session

Wait, unity? I’ve installed Xubuntu because I prefer to use xfce, why should be unity configured?! So I’ve opened  /etc/lightdm/lightdm.conf and edited it like this:


After a reboot, probably it would have been enough to restart just lightdm, I got back my desktop environment.