radeon dual head

[Jethro Tull]

I'm trying to configure my Xserver to get working as th dual head mode on my laptop.it's a 1280x800 flat screen and the extra monitor is a 1440x900the specific config lines are as follows:Section "Monitor"    Identifier  "My Monitor"    HorizSync   30-48    VertRefresh    60EndSectionSection "Monitor"    Identifier    "Extra Mon"    HorizSync     31.5-67.5    VertRefresh   75EndSectionSection "Screen"    Identifier  "Screen 1"    Device      "** ATI Radeon (generic)               [radeon]"    Monitor     "My Monitor"    DefaultDepth 24        Subsection "Display"                Depth           24                Modes           "1280x800" "800x600"                ViewPort        0 0        EndSubsectionEndSectionSection "Screen"    Identifier    "Screen 2"    Device        "** ATI Radeon (generic)               [radeon]"    Monitor       "Extra Mon"    DefaultDepth  24         Subsection "Display"         Depth          24         Modes          "1440x900"         ViewPort       0 0         EndSubsectionEndSectionSection "ServerLayout"    Identifier  "Simple Layout"    Screen "Screen 1"    Screen "Screen 2" LeftOf "Screen1"...EndSectionbut it doesn't work as expected, the extra monitor display seems to be assigned a 600x800 resolution and show a part of the desktop but can slip on the whole desktop when the pointer reaches an end of the screen.While the main screen of the laptop is assigned the correct resolution.the output of the Xorg.log is as follows:(==) Log file: "/var/log/Xorg.0.log", Time: Sun Dec 23 13:18:44 2007(==) Using config file: "/etc/X11/xorg.conf"(==) ServerLayout "Simple Layout"(**) |-->Screen "Screen 1" (0)(**) |   |-->Monitor "My Monitor"(**) |   |-->Device "** ATI Radeon (generic)               [radeon]"(**) |-->Screen "Screen 2" (1)(**) |   |-->Monitor "Extra Mon"(**) |   |-->Device "** ATI Radeon (generic)               [radeon]"(EE) Screen Screen1 doesn't exist: deleting placementWhile when the xorg.conf file is configured for a single head everything is OK.
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