İki Ekranı Tek Bir Ekran Gibi Kullanmak

xorg.conf dosyasından ayarlayamazsanız.

vim .config/openbox/autostart
xrandr --output VGA1 --auto --right-of LVDS1

Ekranlarınızın çözünürlüklerini tespit etmek için
xrandr --current
Screen 0: minimum 320 x 200, current 2806 x 900, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1366x768 59.9*+
1360x768 59.8 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1440x900+1366+0 (normal left inverted right x axis y axis) 408mm x 255mm
1440x900 59.9*+ 75.0
1280x1024 75.0 60.0
1152x864 75.0 67.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 75.0 60.3 56.2
640x480 75.0 60.0
720x400 70.1

xorg.conf dosyasından ayarlamak isterseniz örnek aşağıdadır.
vim /etc/X11/xorg.conf

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
        Identifier      "X.org Configured"
        Screen          "Screen0"
        # ikinci screen icin yon belirtilmezse ayni goruntu 2 monitorde birden gosterilir
        # Screen         "Screen1"
        # Screen          "Screen1" LeftOf "Screen0"
        Screen          "Screen1" RightOf "Screen0"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
EndSection

Section "Files"
        FontPath        "/usr/share/fonts/X11/misc"
        FontPath        "/usr/X11R6/lib/X11/fonts/misc"
        FontPath        "/usr/share/fonts/X11/cyrillic"
        FontPath        "/usr/X11R6/lib/X11/fonts/cyrillic"
        FontPath        "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath        "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
        FontPath        "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath        "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
        FontPath        "/usr/share/fonts/X11/Type1"
        FontPath        "/usr/X11R6/lib/X11/fonts/Type1"
        FontPath        "/usr/share/fonts/X11/100dpi"
        FontPath        "/usr/X11R6/lib/X11/fonts/100dpi"
        FontPath        "/usr/share/fonts/X11/75dpi"
        FontPath        "/usr/X11R6/lib/X11/fonts/75dpi"
        # path to defoma fonts
        FontPath        "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
        Load    "i2c"
        Load    "bitmap"
        Load    "ddc"
        Load    "dri"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "vbe"
EndSection

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "tr"
EndSection

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "Emulate3Buttons"       "true"
EndSection

Section "Device"
        Identifier      "Card0"
        Driver          "intel"
        BusID           "PCI:0:2:0"
EndSection

Section "Device"
        Identifier      "Card1"
        Driver          "intel"
        BusID           "PCI:0:2:0"
EndSection

Section "Monitor"
        Identifier      "Sony Vaio"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection

Section "Monitor"
        Identifier      "LG"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection

Section "Screen"
        Identifier      "Screen0"
        Device          "Card0"
        Monitor         "Sony Vaio"
        DefaultDepth    16
        SubSection "Display"
                Depth           1
                Modes           "1366x768" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1366x768" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1366x768" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1366x768" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1366x768" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1366x768" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
EndSection
Section "Screen"
        Identifier      "Screen1"
        Device          "Card1"
        Monitor         "LG"
        DefaultDepth    16
        SubSection "Display"
                Depth           1
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
        EndSubSection
EndSection

Section "ServerFlags"
        # xinerama, iki monitoru, tek bir monitor gibi kullanmaya imkan verir
        # bu bolum olmazsa birbirinden bagimsiz iki masaustu acilir
        # ama bu durumda bazi uygulamalar, iki ayri monitorde ayni anda acilamaz
        Option          "Xinerama" "on"
EndSection

Section "DRI"
        Mode    0666
EndSection