#765360 lightdm: Login screen should not show up as a active "session" in loginctl

Package:
lightdm
Source:
lightdm
Description:
simple display manager
Submitter:
Petter Reinholdtsen
Date:
2014-10-18 13:30:09 UTC
Severity:
important
#765360#5
Date:
2014-10-14 13:01:04 UTC
From:
To:
I discovered this in Debian Edu when checking if logind can be used as a
data source for shutdown-at-night when it try to discover if a machine
is unused or not.

The output from loginctl when using ssh to log into a machine with no
console user logged in at the moment, look like this:

  SESSION     UID  USER        SEAT
       c2     116  lightdm     seat0
        2    1000  pere

Note how the lightdm login screen is counted as a active login session
on seat0.

Can lightdm be changed to not show up as a active session when the login
screen is displayed?

I suspect it is caused by the /etc/pam.d/lightdm-greeter file listing
the pam_systemd.so module as optional.  At least the problem is fixed
when removing this line.  Perhaps that line should be removed in the
package?
#765360#10
Date:
2014-10-14 18:56:47 UTC
From:
To:
I'm honestly quite reluctant to touch the PAM config blindly. Can you
try with gdm and report your findings?

The pam_systemd manpage gives a hint about a 'class' argument, which can
be set to 'greeter', can you try with it?

Regards,
#765360#15
Date:
2014-10-18 13:27:35 UTC
From:
To:
Also could paste the output of loginctl show-session c2 ?