Right after above comment, unplug and replug mouse - and it then works perfect. (fyi - both of comments were sitting on a docking station, but using the right side direct to notebook USB ports.

[  832.212100] usb 4-1: USB disconnect, address 2
[  834.808123] usb 4-1: new low speed USB device using uhci_hcd and address 3
[  835.035428] usb 4-1: configuration #1 chosen from 1 choice
[  835.068927] input: Microsoft Corporation Microsoft ® Laser Mouse 6000 as /devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0/input/input14
[  835.069128] generic-usb 0003:045E:00F0.0004: input,hidraw2: USB HID v1.11 Mouse [Microsoft Corporation Microsoft ® Laser Mouse 6000] on usb-0000:00:1d.2-1/input0

# lsusb
Bus 003 Device 002: ID 045e:00db Microsoft Corp. Natural Ergonomic Keyboard 4000 V1.0
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 003: ID 045e:00f0 Microsoft Corp. 
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 008: ID 0b97:7762 O2 Micro, Inc. Oz776 SmartCard Reader
Bus 002 Device 007: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader
Bus 002 Device 006: ID 0b97:7761 O2 Micro, Inc. Oz776 1.1 Hub
Bus 002 Device 002: ID 413c:a005 Dell Computer Corp. Internal 2.0 Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 006: ID 0424:2504 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 413c:0058 Dell Computer Corp. Port Replicator

# lsusb -v -s 4:3

Bus 004 Device 003: ID 045e:00f0 Microsoft Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x045e Microsoft Corp.
  idProduct          0x00f0 
  bcdDevice            1.01
  iManufacturer           1 Microsoft Corporation
  iProduct                2 Microsoft � Laser Mouse 6000
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      2 Mouse
      iInterface              0 
      ** UNRECOGNIZED:  09 21 11 01 21 01 22 3b 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)