Dual screen GDM problem

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https://bbs.archlinux.org – I have a rather big problem with my dual screen setup. The left screen is 1920x1080 and the right one 1360x768.This is my /etc/X11/xorg.conf:Section "Monitor" Identifier "DVI-0" Option "Primary" "true" Option "Position" "0 0" Option "PreferredMode" "1920x1080" EndSection # Section "Monitor" Identifier "DVI-1" Option "Position" "1920 180" Option "PreferredMode" "1360x768" EndSectionI set it up as described here. However, GDM doesn't behave (HowTos)