Hello François, > Gnome applications like gnome-terminal and xscreensavers seem to be > unable to work with two screen and xinerama enabled. (FC6) > Section "Device" > Identifier "Videocard1" > Driver "nvidia" > VendorName "NVIDIA Corporation" > BoardName "GeForce 7800 GTX" > BusID "PCI:8:0:0" > Screen 1 > EndSection Since you use a nvidia card you probably don't want to use xinerama but use the nvidia twinview option instead. The below xorg.conf is what I use for my dual head setup: # nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 1.0 (buildmeister@builder26) Wed Mar 29 15:31:59 PST 2006 Section "ServerLayout" Identifier "Multihead layout" Screen 0 "Screen0" 0 0 InputDevice "Mouse0" "CorePointer" InputDevice "Keyboard0" "CoreKeyboard" Option "Xinerama" "off" Option "Clone" "off" EndSection Section "Files" ModulePath "/usr/lib64/xorg/modules/extensions/nvidia" ModulePath "/usr/lib64/xorg/modules/extensions" ModulePath "/usr/lib64/xorg/modules" FontPath "unix/:7100" EndSection Section "Module" Load "dbe" Load "extmod" Load "fbdevhw" Load "bitmap" Load "glx" Load "v4l" Load "ddc" #Load "dri" Load "record" Load "freetype" Load "type1" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "IMPS/2" Option "Device" "/dev/input/mice" Option "ZAxisMapping" "4 5" Option "Emulate3Buttons" "yes" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Monitor Vendor" ModelName "LCD Panel 1280x1024" HorizSync 31.5 - 67.0 VertRefresh 50.0 - 75.0 Option "dpms" EndSection Section "Device" Identifier "Videocard0" Driver "nvidia" VendorName "Videocard Vendor" BoardName "NVIDIA GeForce 6600 GT" Option "TwinView" # Option "RenderAccel" "true" Option "AllowGLXWithComposite" "true" Option "XAANoOffscreenPixmaps" Option "TripleBuffer" "True" # Option "NoBandWidthTest" "no" Option "UseEdidFreqs" Option "IgnoreDisplayDevices" "TV" Option "SecondMonitorHorizSync" "30.000-82.000" Option "SecondMonitorVertRefresh" "56 - 60" Option "TwinViewOrientation" "RightOf" Option "MetaModes" "1280x1024, 1280x1024" Option "ConnectedMonitor" "DFP, DFP" BusID "PCI:5:0:0" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 Option "AddARGBGLXVisuals" SubSection "Display" Viewport 0 0 Depth 16 Modes "800x600" "640x480" EndSubSection SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1152x768" "1024x768" "800x600" "640x480" EndSubSection EndSection Section "Extensions" Option "Composite" "Enable" EndSection nvidia-xconfig can generate the file for you and settings can be edited by the nividia-settings graphical menu. regards, Marcel Janssen