Section "ServerLayout"
    Identifier "Dual"
    Screen 0 "Screen0" 0 0
    Screen 1 "Screen1" RightOf "Screen0"
EndSection

Section "Device"
    Identifier "Card0"
    Driver "modesetting"
    Option "ZaphodHeads" "HDMI-1"
    Screen 0
EndSection

Section "Device"
    Identifier "Card1"
    Driver "modesetting"
    Option "ZaphodHeads" "HDMI-2"
    Screen 1
EndSection

Section "Screen"
    Identifier "Screen0"
    Device "Card0"
    SubSection "Display"
        Modes "1920x1080"
        Depth 24
    EndSubSection
EndSection

Section "Screen"
    Identifier "Screen1"
    Device "Card1"
    SubSection "Display"
        Modes "640x480"
        Depth 24
    EndSubSection
EndSection