virtualbox中的双监视器linux guest虚拟机

我了解到，较新的VirtualBox支持带有双监视器的Linux guest虚拟机。启动Arch VM时，我可以启动两个监视器，但是无法让Xorg扩展到第二个监视器。它们不断以克隆模式显示。有人成功做到了吗？如果是这样，您可以共享您的xorg.conf吗？

编辑：我的xorg.conf（我尝试将增量BusID作为测试，但之前已将它们相同）。

Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen      0  "Screen0" 0 0
        Screen      1  "Screen1" RightOf "Screen0"
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/misc/"
        FontPath     "/usr/share/fonts/TTF/"
        FontPath     "/usr/share/fonts/OTF/"
        FontPath     "/usr/share/fonts/Type1/"
        FontPath     "/usr/share/fonts/100dpi/"
        FontPath     "/usr/share/fonts/75dpi/"
EndSection

Section "Module"
        Load  "record"
        Load  "dbe"
        Load  "dri2"
        Load  "glx"
        Load  "extmod"
        Load  "dri"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection

Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection

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

Section "Device"
        Identifier  "Card1"
        Screen      1
        Driver      "vboxvideo"
        BusID       "PCI:0:2:1"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Card1"
        Monitor    "Monitor1"
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

我使用randr作为解决方法

xrandr --output VBOX1 --right-of VBOX0

我把它放在自动启动中。登录后即可运行

您的conf文件中有什么？如果您没有明确告诉您有多个监视器，它将仅克隆输出。如果您不确定如何修改conf来做到这一点，可以参考一些不错的教程，例如xorg archwiki上的教程。