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<htmlet>xen</htmlet>  Xen provides two mechanisms for adding USB devices to an HVM virtualization domainU guest system. The first technique is a long-term solution requiring the addition of the device to the domainU configuration file and a domainU restart. The second solution is better suited to adding a device temporarily to a running Xen HVM guest system and involves the use of the Qemu QEMU monitor.

USB devices which are connected are shown with a ''vendor:product'' value pair. Devices with ''0000:0000'' represent USB ports where no device is connected or a device is connected but currently powered off. A list of device ID strings is contained in the ''/usr/share/hwdata/usb.ids'' file). If no matching ID is found in the file this field is left blank. This file is constantly updated so it may be worth downloading the latest release from [http://www.linux-usb.org/usb.ids http://www.linux-usb.org/usb.ids].