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

KERNEL[1283490028.133306] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/mouse1 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/mouse1
SUBSYSTEM=input
DEVNAME=input/mouse1
SEQNUM=1848
MAJOR=13
MINOR=33

UDEV  [1283490028.134697] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/mouse1 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/mouse1
SUBSYSTEM=input
DEVNAME=/dev/input/mouse1
SEQNUM=1848
ID_INPUT=1
ID_INPUT_MOUSE=1
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_TYPE=hid
ID_BUS=usb
ID_USB_INTERFACES=:030102:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usbhid
ID_PATH=pci-0000:00:06.0-usb-0:2:1.0
MAJOR=13
MINOR=33
DEVLINKS=/dev/char/13:33 /dev/input/by-id/usb-Logitech_USB_Trackball-mouse /dev/input/by-path/pci-0000:00:06.0-usb-0:2:1.0-mouse

KERNEL[1283490028.171994] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/event8 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/event8
SUBSYSTEM=input
DEVNAME=input/event8
SEQNUM=1849
MAJOR=13
MINOR=72

UDEV  [1283490028.173635] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/event8 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8/event8
SUBSYSTEM=input
DEVNAME=/dev/input/event8
SEQNUM=1849
ID_INPUT=1
ID_INPUT_MOUSE=1
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_TYPE=hid
ID_BUS=usb
ID_USB_INTERFACES=:030102:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usbhid
ID_PATH=pci-0000:00:06.0-usb-0:2:1.0
MAJOR=13
MINOR=72
DEVLINKS=/dev/char/13:72 /dev/input/by-id/usb-Logitech_USB_Trackball-event-mouse /dev/input/by-path/pci-0000:00:06.0-usb-0:2:1.0-event-mouse

KERNEL[1283490028.231794] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8
SUBSYSTEM=input
PRODUCT=3/46d/c408/110
NAME="Logitech USB Trackball"
PHYS="usb-0000:00:06.0-2/input0"
UNIQ=""
EV==17
KEY==1f0000 0 0 0 0
REL==3
MSC==10
MODALIAS=input:b0003v046DpC408e0110-e0,1,2,4,k110,111,112,113,114,r0,1,am4,lsfw
SEQNUM=1850

KERNEL[1283490028.231876] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006/hidraw/hidraw5 (hidraw)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006/hidraw/hidraw5
SUBSYSTEM=hidraw
DEVNAME=hidraw5
SEQNUM=1851
MAJOR=251
MINOR=5

KERNEL[1283490028.231971] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006 (hid)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006
SUBSYSTEM=hid
HID_ID=0003:0000046D:0000C408
HID_NAME=Logitech USB Trackball
HID_PHYS=usb-0000:00:06.0-2/input0
MODALIAS=hid:b0003v0000046Dp0000C408
SEQNUM=1852

KERNEL[1283490028.232027] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=46d/c408/1400
TYPE=0/0/0
INTERFACE=3/1/2
MODALIAS=usb:v046DpC408d1400dc00dsc00dp00ic03isc01ip02
SEQNUM=1853

KERNEL[1283490028.232086] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2
SUBSYSTEM=usb
DEVNAME=bus/usb/004/003
DEVTYPE=usb_device
PRODUCT=46d/c408/1400
TYPE=0/0/0
BUSNUM=004
DEVNUM=003
SEQNUM=1854
MAJOR=189
MINOR=386

UDEV  [1283490028.232451] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8 (input)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input8
SUBSYSTEM=input
PRODUCT=3/46d/c408/110
NAME="Logitech USB Trackball"
PHYS="usb-0000:00:06.0-2/input0"
UNIQ=""
EV==17
KEY==1f0000 0 0 0 0
REL==3
MSC==10
MODALIAS=input:b0003v046DpC408e0110-e0,1,2,4,k110,111,112,113,114,r0,1,am4,lsfw
SEQNUM=1850

UDEV  [1283490028.232522] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006/hidraw/hidraw5 (hidraw)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006/hidraw/hidraw5
SUBSYSTEM=hidraw
DEVNAME=/dev/hidraw5
SEQNUM=1851
MAJOR=251
MINOR=5
DEVLINKS=/dev/char/251:5

UDEV  [1283490028.233898] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006 (hid)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0006
SUBSYSTEM=hid
HID_ID=0003:0000046D:0000C408
HID_NAME=Logitech USB Trackball
HID_PHYS=usb-0000:00:06.0-2/input0
MODALIAS=hid:b0003v0000046Dp0000C408
SEQNUM=1852

UDEV  [1283490028.233958] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=46d/c408/1400
TYPE=0/0/0
INTERFACE=3/1/2
MODALIAS=usb:v046DpC408d1400dc00dsc00dp00ic03isc01ip02
SEQNUM=1853

UDEV  [1283490028.234167] remove   /devices/pci0000:00/0000:00:06.0/usb4/4-2 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/004/003
DEVTYPE=usb_device
PRODUCT=46d/c408/1400
TYPE=0/0/0
BUSNUM=004
DEVNUM=003
SEQNUM=1854
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_BUS=usb
ID_USB_INTERFACES=:030102:
UPOWER_VENDOR=Logitech, Inc.
MAJOR=189
MINOR=386
DEVLINKS=/dev/char/189:386

KERNEL[1283490031.011958] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2
SUBSYSTEM=usb
DEVNAME=bus/usb/004/005
DEVTYPE=usb_device
PRODUCT=46d/c408/1400
TYPE=0/0/0
BUSNUM=004
DEVNUM=005
SEQNUM=1855
MAJOR=189
MINOR=388

KERNEL[1283490031.014879] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=46d/c408/1400
TYPE=0/0/0
INTERFACE=3/1/2
MODALIAS=usb:v046DpC408d1400dc00dsc00dp00ic03isc01ip02
SEQNUM=1856

KERNEL[1283490031.015133] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007 (hid)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007
SUBSYSTEM=hid
HID_ID=0003:0000046D:0000C408
HID_NAME=Logitech USB Trackball
HID_PHYS=usb-0000:00:06.0-2/input0
DRIVER=generic-usb
MODALIAS=hid:b0003v0000046Dp0000C408
SEQNUM=1857

KERNEL[1283490031.024786] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14
SUBSYSTEM=input
PRODUCT=3/46d/c408/110
NAME="Logitech USB Trackball"
PHYS="usb-0000:00:06.0-2/input0"
UNIQ=""
EV==17
KEY==1f0000 0 0 0 0
REL==3
MSC==10
MODALIAS=input:b0003v046DpC408e0110-e0,1,2,4,k110,111,112,113,114,r0,1,am4,lsfw
SEQNUM=1858

UDEV  [1283490031.024969] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/004/005
DEVTYPE=usb_device
PRODUCT=46d/c408/1400
TYPE=0/0/0
BUSNUM=004
DEVNUM=005
SEQNUM=1855
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_BUS=usb
ID_USB_INTERFACES=:030102:
UPOWER_VENDOR=Logitech, Inc.
MAJOR=189
MINOR=388
DEVLINKS=/dev/char/189:388

KERNEL[1283490031.025168] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/mouse1 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/mouse1
SUBSYSTEM=input
DEVNAME=input/mouse1
SEQNUM=1859
MAJOR=13
MINOR=33

KERNEL[1283490031.025262] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/event8 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/event8
SUBSYSTEM=input
DEVNAME=input/event8
SEQNUM=1860
MAJOR=13
MINOR=72

KERNEL[1283490031.025356] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007/hidraw/hidraw5 (hidraw)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007/hidraw/hidraw5
SUBSYSTEM=hidraw
DEVNAME=hidraw5
SEQNUM=1861
MAJOR=251
MINOR=5

UDEV  [1283490031.027048] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=46d/c408/1400
TYPE=0/0/0
INTERFACE=3/1/2
MODALIAS=usb:v046DpC408d1400dc00dsc00dp00ic03isc01ip02
SEQNUM=1856

UDEV  [1283490031.028411] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007 (hid)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007
SUBSYSTEM=hid
HID_ID=0003:0000046D:0000C408
HID_NAME=Logitech USB Trackball
HID_PHYS=usb-0000:00:06.0-2/input0
DRIVER=generic-usb
MODALIAS=hid:b0003v0000046Dp0000C408
SEQNUM=1857

UDEV  [1283490031.028453] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007/hidraw/hidraw5 (hidraw)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/0003:046D:C408.0007/hidraw/hidraw5
SUBSYSTEM=hidraw
DEVNAME=/dev/hidraw5
SEQNUM=1861
MAJOR=251
MINOR=5
DEVLINKS=/dev/char/251:5

UDEV  [1283490031.034845] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14
SUBSYSTEM=input
PRODUCT=3/46d/c408/110
NAME="Logitech USB Trackball"
PHYS="usb-0000:00:06.0-2/input0"
UNIQ=""
EV==17
KEY==1f0000 0 0 0 0
REL==3
MSC==10
MODALIAS=input:b0003v046DpC408e0110-e0,1,2,4,k110,111,112,113,114,r0,1,am4,lsfw
SEQNUM=1858

UDEV  [1283490031.038399] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/mouse1 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/mouse1
SUBSYSTEM=input
DEVNAME=/dev/input/mouse1
SEQNUM=1859
ID_INPUT=1
ID_INPUT_MOUSE=1
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_TYPE=hid
ID_BUS=usb
ID_USB_INTERFACES=:030102:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usbhid
ID_PATH=pci-0000:00:06.0-usb-0:2:1.0
MAJOR=13
MINOR=33
DEVLINKS=/dev/char/13:33 /dev/input/by-id/usb-Logitech_USB_Trackball-mouse /dev/input/by-path/pci-0000:00:06.0-usb-0:2:1.0-mouse

UDEV  [1283490031.050172] add      /devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/event8 (input)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:06.0/usb4/4-2/4-2:1.0/input/input14/event8
SUBSYSTEM=input
DEVNAME=/dev/input/event8
SEQNUM=1860
ID_INPUT=1
ID_INPUT_MOUSE=1
ID_VENDOR=Logitech
ID_VENDOR_ENC=Logitech
ID_VENDOR_ID=046d
ID_MODEL=USB_Trackball
ID_MODEL_ENC=USB\x20Trackball
ID_MODEL_ID=c408
ID_REVISION=1400
ID_SERIAL=Logitech_USB_Trackball
ID_TYPE=hid
ID_BUS=usb
ID_USB_INTERFACES=:030102:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usbhid
ID_PATH=pci-0000:00:06.0-usb-0:2:1.0
MAJOR=13
MINOR=72
DEVLINKS=/dev/char/13:72 /dev/input/by-id/usb-Logitech_USB_Trackball-event-mouse /dev/input/by-path/pci-0000:00:06.0-usb-0:2:1.0-event-mouse

^Ctim@lakshmi:~$