Comment 38 for bug 870297

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Lauri Tirkkonen (lotheac) wrote : Re: Lightdm logins not being logged in wtmp

I looked into this a bit. There is a pam module that updates lastlog and wtmp (pam_lastlog(8)), which could be stacked in the lightdm pam config. It doesn't update utmp, however, and utmp is what w(1) and who(1) look at -- see the discussion at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659957.

I guess as it stands, lightdm needs to write the utmp entry, like login(1), since nothing else does. I also propose to add the pam_lastlog module to lightdm's stack to keep lastlog and wtmp up to date.