Debian wheezy 上的三重显示器

Question

我在 Asus Z97 主板上安装了 nVidia GTS 450。今天我买了一个新屏幕，所以我现在总共有三个 - 两个 27 英寸连接到 GTS 450 卡，一个 20 英寸连接到主板输出。大屏幕都可以工作，但我不知道如何使连接到主板的小屏幕工作。

我正在运行 gdm3，但在 gui 配置应用程序中找不到任何内容。重新安装专有图形驱动程序会派上用场吗？

更新 我的 xorg.conf：

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 340.65  (buildmeister@swio-display-x64-rhel04-11)  Tue Dec  2 09:59:38 PST 2014


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

就这样了