如何安装第二张图形卡并使用4台显示器？

我最终决定跳入水沟和窗户。几个小时后，我安装了所有应用程序，一切运行正常。唯一的问题是我在2个nvidia适配器上运行了4个台式机显示器，第一个带有两个屏幕的适配器（GeForce GT 240）可以正常工作，但似乎无法安装第二个适配器（GeForce GT 620）。使用Ubuntu 14.04 LTS（AMD64）

请以简单的说明帮助我。终端信息如下：

nachtland@nachtland-MS-7693:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce GT 240] (rev a2)
02:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 620] (rev a1)

nachtland@nachtland-MS-7693:~$ sudo lshw -C video
[sudo] password for nachtland: 

*-display            
       description: VGA compatible controller
       product: GT215 [GeForce GT 240]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a2
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:82 memory:fd000000-fdffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:fe000000-fe07ffff

*-display
       description: VGA compatible controller
       product: GF108 [GeForce GT 620]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:83 memory:fb000000-fbffffff memory:c8000000-cfffffff memory:d0000000-d1ffffff ioport:d000(size=128) memory:fc000000-fc07ffff
nachtland@nachtland-MS-7693:~$ 

我很难在Linux Mint 64上使用四个监视器，这是我的/etc/X11/xorg.conf。

还使用来自Ubuntu0.0.4 nvidia-331 .113的推荐二进制驱动程序

Section "ServerLayout"

#    Screen   2  "Screen2"  LeftOf  "Screen0"
#    Screen   3  "Screen3"  LeftOf  "Screen2"
# Removed Option "Xinerama" "on"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" RightOf "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "1"
    Option         "Clone" "off"
    # You would need one screen for each monitor
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      "LG Electronics W2253"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "Philips 190WV"
    HorizSync       0.0 - 0.0
    VertRefresh     0.0
    Option         "DPMS"
EndSection

Section "Device"

#    Driver      "nouveau"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 730"
    BusID          "PCI:1:0:0"
Option "AddARGBGLXVisuals" "true"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 730"
    BusID          "PCI:2:0:0"
Option "AddARGBGLXVisuals" "true"
EndSection

Section "Screen"

#    DefaultDepth    24
#    SubSection     "Display"
#        Depth       24
#    EndSubSection
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "metamodes" "DVI-I-1: nvidia-auto-select +0+0, HDMI-0: nvidia-auto-select +1920+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"

#    DefaultDepth    24
#    SubSection     "Display"
#        Depth       24
#    EndSubSection
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "metamodes" "DVI-I-0: nvidia-auto-select +1280+0 {rotation=right}, VGA-0: nvidia-auto-select +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

也许会有所帮助，因为这是最难的事情