Situation: my USB wireless adapter will fall into some sort of an endless loop (i.e., always busy) from time to time, and lose the wireless connection consequencly. Unplug & re-plug the device back to the USB port doesn't solve the problem. The only way to regain the wireless connection is to restart my computer. In Windows, I can just do a "Devcon.exe" to reset the USB device, anyone knows how to do it in ubuntu? thanks.