usbreset

This simple application simulates the plug/unplug of a usb device.

How to compile?

$ gcc -o usbreset usbreset.c

How to use it?

Get the Bus and Device ID of the USB device you want to reset:

$ lsusb
Bus 001 Device 008: ID 0ac8:3420 Z-Star Microelectronics Corp. Venus USB2.0 Camera

Execute the program with sudo privileges

Make necessary substitution for <Bus> and <Device> ids as found by running the lsusb command:

$ sudo ./usbreset /dev/bus/usb/001/008

Notes

• It spends some seconds to finish the reset;
• While the usbreset is running the lsusb command does not work (of course);
• If you are running any application that uses the device, then temporarily it will lost the communication with it.
• Probably you need to re-run your application, if this one is not able to re-detect the device.
• I'm not sure if it can somehow damage your equipment

font: http://askubuntu.com/questions/645/how-do-you-reset-a-usb-device-from-the-command-line