https://www.cnx-software.com/2010/12/13/unusual-usb-device-linux-kerne/
Some USB devices (especially cheap ones) are not fully compatible with the USB Stack and when you connect such devices to your target board, the kernel
unusual usblinux kerneldevicescnxsoftware
https://www.flickr.com/photos/113551735@N04/18031284104/in/faves-32645226@N08/
A USB bulb can cast an unusual light
usbaurorabulbcastunusual