What's hotplug? Many questions are tagged : hot-plug . However , No wiki found in : Tag info I've read this: > Modularized USB drivers are loaded by the generic /sbin/hotplug support in the ker- nel, which is also used for other hotplug devices such as CardBus cards. Therefore , Could we say that hotplug is the responsible on loading/unloading modules automatically ?

From the kernel documentation:

> The hotplug mechanism asynchronously notifies userspace when hardware is inserted, removed, or undergoes a similar significant state change.

There is an event variable for modules, called `DRIVER`, that suggests a driver for handling the hotplugged device.