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如何确定笔记本电脑上的 USB-C 端口是否有视频输出（适用于 USB-C - HDMI 适配器）？

tag-icon • tag-icon hardware xrandr usb-device hdmi lsusb
如何确定笔记本电脑上的 USB-C 端口是否有视频输出（适用于 USB-C - HDMI 适配器）？

我尝试使用带有 hdmi 端口的集线器连接到我的计算机的 USB-C 端口，但这个不起作用。

检查互联网上的其他类似线程（和这里），我发现问题可能是有问题的 USB-C 端口不支持视频输出（集线器本身有 USB 端口并且它们工作正常）。

那么有没有办法在我的电脑上演示它以保持冷静？我只能使用制造商的文档进行检查吗？

欲了解更多信息：

lsusb -t连接轮毂之前：

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 7: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 2, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 3, Class=Video, Driver=uvcvideo, 480M
    |__ Port 10: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 10: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M

lsusb -t连接轮毂后：

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M
    |__ Port 3: Dev 8, If 0, Class=Hub, Driver=hub/4p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 7: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 2, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 2, If 3, Class=Video, Driver=uvcvideo, 480M
    |__ Port 8: Dev 41, If 0, Class=Hub, Driver=hub/5p, 480M
    |__ Port 10: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 10: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M

xrander集线器连接之前和之后的输出：

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 170m
   1920x1080     60.01*+  59.93
   1680x1050     59.95    59.88
   1400x1050     59.98
   1600x900      60.00    59.95    59.82
   1280x1024     60.02
   1400x900      59.96    59.88
   1280x960      60.00
   1368x768      60.00    59.88    59.85
   1280x800      59.81    59.91
   1280x720      59.86    60.00    59.74
   1024x768      60.00
   1024x576      60.00    59.90    59.82
   960x540       60.00    59.63    59.82
   800x600       60.32    56.25
   864x486       60.00    59.92    59.57
   640x480       59.94
   720x405       59.51    60.00    58.99
   640x360       59.84    59.32    60.00
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

xrandrHDMI端口显示器连接后：

Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 310mm x 170mm
   1920x1080     60.01*+  59.93
   1680x1050     59.95    59.88
   1400x1050     59.98
   1600x900      60.00    59.95    59.82
   1280x1024     60.02
   1400x900      59.96    59.88
   1280x960      60.00
   1368x768      60.00    59.88    59.85
   1280x800      59.81    59.91
   1280x720      59.86    60.00    59.74
   1024x768      60.00
   1024x576      60.00    59.90    59.82
   960x540       60.00    59.63    59.82
   800x600       60.32    56.25
   864x486       60.00    59.92    59.57
   640x480       59.94
   720x405       59.51    60.00    58.99
   640x360       59.84    59.32    60.00
HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm
   1920x1080     60.00*+  50.00    59.94
   1680x1050     59.88
   1600x900      60.00
   1280x1024     60.02
   1440x900      59.90
   1280x800      59.91
   1280x720      60.00    50.00    59.94
   1024x768      60.00
   800x600       60.32
   720x576       50.00
   720x480       60.00    59.94
   640x480       60.00    59.94
   720x400       70.08
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

答案1

最后，我的笔记本电脑的USB-C不支持视频输出，似乎无法通过软件演示，只能去找硬件制造商了。

因此，我必须安装支持displaylink驱动程序的 USB 3.0 转 HDMI 适配器，并安装它以获得第二个外部显示器。

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