Much thanks for all your enthusiam.

I placed the Option "ZAxisMapping" "4 5" in the following section:

# **********************************************************************
# Core Pointer's InputDevice section
# **********************************************************************

Section "InputDevice"

# Identifier and driver

     Identifier  "Mouse1"
     Driver      "mouse"
     Option "Protocol"    "Microsoft"
     Option "Device"      "/dev/wsmouse"
     Option "ZAxisMapping" "4 5"

----------
But I still cannot use the scroll wheel.

> As for why the mouse should fail to wake up a sleeping system, is
> this the X server blanking the screen, or is it the laptop's own
> sleep mode?  If the latter, there may be a BIOS option that relates

When the X server screen goes blank, moving the USB mouse does not 
un-blank it.  However, moving the touchpad does (when I have it enabled 
through wsmuxctl).  It's not much of a problem, because I can move the 
arrow keys to enable the screen, but I'm wonder why it is happening.


Thanks,
Yasir