virtualbox 中的双显示器 linux 来宾

Question

我读到较新的 VirtualBox 支持带有双显示器的 Linux 客户机。当我启动 Arch VM 时，我可以让两个显示器启动，但是我无法让 Xorg 跨越到第二个显示器。它们不断以克隆模式显示。有没有人成功做到这一点？如果是这样，你能分享你的 xorg.conf 吗？

编辑：我的 xorg.conf （我尝试使用增量 BusID 作为测试，但之前它们是相同的）。

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

Answer 1

我使用 randr 作为解决方法

xrandr --output VBOX1 --right-of VBOX0

我把它放在我的自动启动中。登录后会运行

Answer 2

你的conf文件里有什么？如果您没有明确告诉它您有多个监视器，它只会克隆输出。如果您不确定如何修改 conf 来执行此操作，这里有一些很好的教程，例如xorg archwiki中的教程。