Greeter showed on laptop screen instead of external when laptop lid is closed

I am using lightdm-gtk 1.6.1.

When I start lightdm I get background image on both 2 screens - laptop's and external one. But greeter is showed only on laptop screen.

I think something should be done to fix this...

Deps versions (Fedora 20 packages):
bash 4.2.45-4.fc20
chkconfig 1.3.60-4.fc20
gnome-themes-standard 3.10.0-1.fc20
libX11 1.6.1-1.fc20
atk 2.10.0-1.fc20
glibc 2.18-11.fc20
cairo-gobject 1.13.1-0.1.git337ab1f.fc20
cairo 1.13.1-0.1.git337ab1f.fc20
gtk3 3.10.6-1.fc20
gdk-pixbuf2 2.30.3-1.fc20
glib2 2.38.2-2.fc20
gtk3 3.10.6-1.fc20
lightdm-gobject 1.8.5-2.fc20
pango 1.36.1-1.fc20
glibc 2.18-11.fc20
lightdm 1.8.5-2.fc20
glibc 2.18-11.fc20
glibc.i686 2.18-11.fc20