GDM does not allow me to login

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https://bbs.archlinux.org – Ok, I investigated problem a bit.I have GDM configured with autologin, what was working for me for a while and now it stopped. Here's the output of stystemctl status gdm.service:gdm.service - GNOME Display Manager Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled) Active: active (running) since Wed, 2012-11-07 23:44:17 CET; 4min 9s ago Main PID: 393 (gdm-binary) CGroup: name=systemd:/system/gdm.service ├ 393 /usr/sbin/gdm-binary ├ 404 /usr/lib/gdm/gdm-simple-slave --display-id /org/gnome/DisplayManager/Displays/_0 └ 407 /usr/bin/Xorg :0 -background n (HowTos)