Xubuntu 20.04 Guest Session Logout Fails

[Graham Jenkins]

I've edited "/usr/share/lightdm/lightdm.conf.d/50-disable-guest.conf" so that it now has "allow-guest=true". And I'm now able to login to a Guest Session.

But when I attempt to logout I get:

Receiver error while trying to log out
GDBus.Error.org .. Type of message "(yb)", does not match expected type "(b)"

This occurs on both of the Xubuntu 20.04 machines I have, and also on a Virtualbox guest.

lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

apt-cache policy lightdm
lightdm:
  Installed: 1.30.0-0ubuntu3.1
  Candidate: 1.30.0-0ubuntu3.1
  Version table:
 *** 1.30.0-0ubuntu3.1 500
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

[Lou (lou-gregory42)]

This also happens to me - NOT a guest session.