lightdm starts a syndameon instance which is not terminated upon session startup.
So there is the conflict: two syndaemon instances, one from lightdm and one from logged in user.
Just experienced this problem after going from gdm back to lightdm.
This does not happen with gdm.
lightdm syndaemon instance must be terminated before starting session (and user's syndaemon instance)
lightdm starts a syndameon instance which is not terminated upon session startup.
So there is the conflict: two syndaemon instances, one from lightdm and one from logged in user.
Just experienced this problem after going from gdm back to lightdm.
This does not happen with gdm.
lightdm syndaemon instance must be terminated before starting session (and user's syndaemon instance)
Regards