通过 USB-C 连接的外接显示器 → HDMI/VGA/2xUSB 适配器不工作

Question

我在 Lenovo Ideapad 上工作，Ubuntu 18.04。我有一个外接显示器在 HDMI 上工作正常。我想通过 USB-C → HDMI/VGA/2xUSB 适配器添加第二台显示器，但未检测到。适配器在 Windows 上运行良好，在 Ubuntu 上，我使用 USB 设备（USB -> USB-C）检查了这一点。结果lsusb -t：

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 1: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 4: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 7: Dev 5, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 7: Dev 5, If 1, Class=Wireless, Driver=btusb, 12M
    |__ Port 8: Dev 6, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 8: Dev 6, If 0, Class=Video, Driver=uvcvideo, 480M

的结果xrandr：

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1920x1080     60.05*+  60.01    59.97    59.96    59.93  
   1680x1050     59.95    59.88  
   1600x1024     60.17  
   1400x1050     59.98  
   1600x900      59.99    59.94    59.95    59.82  
   1280x1024     60.02  
   1440x900      59.89  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1440x810      60.00    59.97  
   1368x768      59.88    59.85  
   1360x768      59.80    59.96  
   1280x800      59.99    59.97    59.81    59.91  
   1152x864      60.00  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   800x512       60.17  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   720x450       59.89  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   680x384       59.80    59.96  
   640x400       59.88    59.98  
   576x432       60.06  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)

另外，当我dmesg -wH通过 usb-c 运行和插入/拔出显示器时，它什么也没有显示。

你能帮忙吗？