I have this two-monitor configuration that works flawlessly in the default 12.10 GNOME wm. This is my xorg.conf:

```
Section "Monitor"
    Identifier "VGA0"
    Option "Enable" "true"
    Modeline "1920x1200_60.00"  193.16  1920 2048 2256 2592  1200 1201 1204 1242  -HSync +Vsync
    Option "PreferredMode" "1920x1200_60.00"
EndSection

Section "Monitor"
    Identifier "LVDS0"
    Option "Enable" "true"
    Modeline "1368x768_60.00"  85.86  1368 1440 1584 1800  768 769 772 795  -HSync +Vsync
    Option "PrefferedMode" "1368x768_60.00"
EndSection

Section "Device"
    Identifier "Radeon0"
    Driver "radeon"
    Screen 0
EndSection

Section "Device"
    Identifier "Radeon1"
    Driver "radeon"
    Screen 1
EndSection

Section "Screen"
    Identifier "Big Screen"
    Device "Radeon0"
    Monitor "VGA0"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
        Modes "1920x1200"
    EndSubSection
EndSection

Section "Screen"
    Identifier "Little Screen"
    Device "Radeon1"
    Monitor "LVDS0"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
        Modes "1368x768"
    EndSubSection
EndSection

Section "ServerLayout"
        Identifier "My Layout"
        Screen 0 "Big Screen"
        Screen 1 "Little Screen" RightOf "Big Screen"
        Option "Xinerama" "true"
EndSection

```

However, awesome wm that I am trying to set up right now is simply mirroring upper left part of the bigger screen to the smaller screen. Although I am happy that the resolution is right, I would obviously like to fill each screen with different content.

What am I doing wrong?