During the initial installation on my Thinkpad T42, YaST2 selected "Ignore mouse
- regardless if one exists" as the mouse model. What exactly does this selection
do? I could not find any explanation and this entry is quite confusing in my
opinion. The mouse worked, however. This is the output of "hwinfo --mouse" out
of a running system:

18: USB 00.2: 10503 USB Mouse
  [Created at usb.122]
  Unique ID: Eopr.BCep8RIGl_5
  Parent ID: uIhY.QumiBCsF43B
  SysFS ID: /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.2
  SysFS BusID: 3-1:1.2
  Hardware Class: mouse
  Model: "Cherry Mikroschalter USB Mouse"
  Hotplug: USB
  Vendor: usb 0x046a "Cherry Mikroschalter GmbH"
  Device: usb 0x0027
  Revision: "0.07"
  Compatible to: int 0x0210 0x0015
  Driver: "usbhid"
  Device File: /dev/input/mice (/dev/input/mouse1)
  Device Number: char 13:63 (char 13:33)
  Speed: 1.5 Mbps
  Driver Info #0:
    Buttons: 5
    Wheels: 1
    XFree86 Protocol: explorerps/2
    GPM Protocol: exps2
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #15 (Hub)

21: PS/2 00.0: 10500 PS/2 Mouse
  [Created at input.140]
  Unique ID: AH6Q.RgweIoOI2K6
  Hardware Class: mouse
  Model: "PS/2 Generic Mouse"
  Vendor: int 0x0210
  Device: int 0x0003 "PS/2 Generic Mouse"
  Device File: /dev/input/mice (/dev/input/mouse0)
  Device Number: char 13:63 (char 13:32)
  Driver Info #0:
    Buttons: 3
    Wheels: 0
    XFree86 Protocol: explorerps/2
    GPM Protocol: exps2
  Config Status: cfg=new, avail=yes, need=no, active=unknown