systemd-logind: failed to get session

[Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxxx>]

Hi,

Arch runs without any issues, so I randomly discovered this:

  [rocketmouse@archlinux ~]$ grep EE /var/log/Xorg.0.log
    [    26.702] Current Operating System: Linux archlinux
                 3.10.61-rt65-1-rt-lts x86_64
    [    27.745] (EE) systemd-logind: failed to get session:
                 PID 437 does not belong to any known session
  [rocketmouse@archlinux ~]$ ps aux | grep 437
    root       437  2.1  2.2 297136 84320 tty7     Ssl+ Sep22  32:09
               /usr/lib/xorg-server/Xorg :0 -seat seat0
               -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch

Web research regarding "does not belong to any known session" without
experiencing issues leads nowhere.

What could be the reason?

Regards,
Ralf