VirtualBox 图形设置缺少图形控制器选项
答案1
解决方案似乎是通过重新安装新版本的 VirtualBox 来简化的，我不确定该问题可能是由将 Windows home 升级到 Windows pro 或使用虚拟化设置引起的，但由于这个问题，即使配置了多个虚拟显示器，也无法在客户机 Virtualbox 中启用多个虚拟显示器，但始终只有一个可用，通过单击启用菜单没有任何作用（该问题也在此处详细说明https://forums.virtualbox.org/viewtopic.php?f=3&t=93941#p453148）也无法通过 xrandr 工具向断开连接的显示器添加和输出新的分辨率来解决。（
https://bbs.archlinux.org/viewtopic.php?pid=1410831#p1410831
I think I may have spoken too soon. I was able to create a "virtual" display by adding a new mode to one of the disconnected displays listed in xrandr using
xrandr --addmode VIRTUAL1 1024x768
I then simply enabled the display like you would normally:
xrandr --output VIRTUAL1 --mode 1024x768 --left-of HDMI3
Furthermore, combined with x11vnc -clip, I am able to use this to convert my android tablet to a second monitor. The perfomrance is pretty crappy at the moment, unfortunately, but that's whole other area to be explored.
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