Bug#727192: This looks like gnome bug 691269 - lock screen with pam_krb5 authentication doesn't update ticket cache

[John Hughes]

*https://bugzilla.gnome.org/show_bug.cgi?id=691269* 
<https://bugzilla.redhat.com/show_bug.cgi?id=1032154>

And Redhat bug***1032154* 
<https://bugzilla.redhat.com/show_bug.cgi?id=1032154> -gdm calls 
pam_setcred with PAM_ESTABLISH_CRED instead of PAM_REINITIALIZE_CRED 
during screen unlock

https://bugzilla.redhat.com/show_bug.cgi?id=1032154

The gnome bugzilla has a patch.  I'll try it.