Comment 27 for bug 1309535

#19 works for me except there are two extra lines and another identical file to change:

    #auth optional pam_kwallet.so
    #auth optional pam_kwallet5.so
    #session optional pam_kwallet.so auto_start
    #session optional pam_kwallet5.so auto_start

...are the four lines to comment out.

    /etc/pam.d/lightdm
    /etc/pam.d/lightdm-greeter

...are the two files to modify.