jo@jo-P53E:~$ udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[21354.809303] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3 (usb)
KERNEL[21354.810377] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0 (usb)
KERNEL[21354.812449] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/video4linux/video1 (video4linux)
KERNEL[21354.812554] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28 (input)
KERNEL[21354.812834] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28/event8 (input)
KERNEL[21354.813019] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.1 (usb)
KERNEL[21354.813835] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2 (usb)
KERNEL[21354.816413] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
KERNEL[21354.816762] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/pcmC1D0c (sound)
KERNEL[21354.817083] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/controlC1 (sound)
KERNEL[21354.817166] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.3 (usb)
UDEV  [21354.823284] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3 (usb)
UDEV  [21354.823425] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3 (usb)
UDEV  [21354.823512] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.1 (usb)
UDEV  [21354.825383] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.1 (usb)
UDEV  [21354.825477] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2 (usb)
UDEV  [21354.825584] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0 (usb)
UDEV  [21354.826945] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.828917] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.3 (usb)
UDEV  [21354.829095] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0 (usb)
UDEV  [21354.830587] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2 (usb)
KERNEL[21354.830985] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.831697] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.3 (usb)
UDEV  [21354.832556] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28 (input)
UDEV  [21354.834271] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28/event8 (input)
UDEV  [21354.835473] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.837044] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/video4linux/video1 (video4linux)
UDEV  [21354.837111] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28 (input)
UDEV  [21354.840076] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/pcmC1D0c (sound)
UDEV  [21354.840139] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/video4linux/video1 (video4linux)
KERNEL[21354.840847] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.841894] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input28/event8 (input)
UDEV  [21354.842990] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/pcmC1D0c (sound)
UDEV  [21354.848318] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/controlC1 (sound)
UDEV  [21354.848927] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1/controlC1 (sound)
UDEV  [21354.851109] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.852727] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.854875] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)
UDEV  [21354.857145] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.2/sound/card1 (sound)