How to check USB devices

To check the available USB devices run

$ lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 1: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M
            |__ Port 2: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
            |__ Port 2: Dev 5, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
            |__ Port 3: Dev 6, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 4: Dev 7, If 3, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 4: Dev 7, If 1, Class=Video, Driver=uvcvideo, 480M
            |__ Port 4: Dev 7, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 4: Dev 7, If 0, Class=Video, Driver=uvcvideo, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M

Missing devices

If an expected device does not appear in the list unplug the device, run

$ journalctl -kf

replug the device and check for error messages.

Press CTRL+C to exit journalctl