lsusb - 2540p-ubuntu12
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 03f0:231d Hewlett-Packard
Bus 001 Device 004: ID 03f0:241d Hewlett-Packard Gobi 2000 Wireless Modem (QDL mode)
Bus 001 Device 005: ID 138a:0007 Validity Sensors, Inc. VFS451 Fingerprint Reader
Bus 001 Device 006: ID 04f2:b163 Chicony Electronics Co., Ltd
Bus 002 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver