Can't get dual-head display to work with nouveau.

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https://bbs.archlinux.org – I can't get nouveau to run as a dual-head across my two monitors.  At the moment, I'm running this config, but my displays are mirrored.  What am I doing wrong?Section "ServerLayout" Identifier "Layout" Screen "Screen" EndSection Section "Device" Identifier "Video Card" Driver "nouveau" Option "Monitor-DVI-I-1" "Right Monitor" Option "Monitor-DP-1" "Left Monitor" EndSection Section "Monitor" Identifier "Left Monitor" EndSection Se (HowTos)