Comment 7 for bug 599185

I can confirm my webcam is indeed an external USB device.

Find below both a dmesg & lsusb dump;

$ dmesg
[22396.296024] usb 5-2: new full speed USB device using uhci_hcd and address 3
[22396.460634] usb 5-2: configuration #1 chosen from 1 choice
[22396.505127] uvcvideo: Found UVC 1.00 device USB 2.0 PC Camera (058f:3820)
[22396.509754] input: USB 2.0 PC Camera as /devices/pci0000:00/0000:00:1d.3/usb5/5-2/5-2:1.0/input/input7
[22396.509903] usbcore: registered new interface driver uvcvideo
[22396.514269] USB Video Class driver (v0.1.0)

$ lsusb
Bus 005 Device 003: ID 058f:3820 Alcor Micro Corp.
Bus 005 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 003: ID 0458:003a KYE Systems Corp. (Mouse Systems)
Bus 003 Device 002: ID 04f2:0403 Chicony Electronics Co., Ltd KU-0420 keyboard
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub