I have this problem after installing updates yesterday. Looks like like
how Eugene shows in comment #10.
The attachment contains the data logged in x-0.log, seat0-greeter.log,
lightdm.log, and x-1.log in the /var/log/lightdm directory during a
test. I pressed CTRL-ALT-L, waited 10 seconds, clicked "Switch to
greeter...", waited 10 seconds, then logged in and stopped recording.
There is a DBus error, but not much else.
** Attachment added: "lightdmlogs.txt"
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