Well, Dimitri's solution in #9 above didn't help my situation, so maybe there are several causes of the same symptom. The /etc/pam.d/lightdm file I had in Ubuntu 13.04 is the same as what I started with in 13.10.
Well, Dimitri's solution in #9 above didn't help my situation, so maybe there are several causes of the same symptom. The /etc/pam.d/lightdm file I had in Ubuntu 13.04 is the same as what I started with in 13.10.