want to use old serial mouse

[Steve Kleene <skdeb@syrano.acb.uc.edu>]

I have a good new installation of testing (Wheezy).  I would like to use my
old three-button roll-ball serial mouse (Logitech M-MD15L) but have so far
failed.  The PC is new with an Intel i5 motherboard and a serial port.

With Lenny, it was sufficient to have this section in xorg.conf:

  Section "InputDevice"
          Identifier      "Configured Mouse"
          Driver          "mouse"
          Option          "CorePointer"
          Option          "Device"                "/dev/ttyS0"
          Option          "Protocol"              "Microsoft"
          Option          "Emulate3Buttons"       "true"
  EndSection

That hasn't worked.  I also tried replacing "/dev/ttyS0" with
"/dev/input/mice".  I have tried the same two versions of xorg.conf with the
mouse on a serial-to-USB adapter instead of the direct serial port.  None of
these four configurations supported the serial mouse.  I'm testing while
running the fvwm window manager.  I have xserver-xorg-input-mouse installed.

In all four cases, Xorg.0.log looked about the same.  These were the only
lines with "mouse" in them:

  (**) |-->Input Device "Configured Mouse"
  (WW) AllowEmptyInput is on, devices using drivers 'kbd', 'mouse' or \
    'vmmouse' will be disabled.
  (WW) Disabling Configured Mouse
  (==) intel(0): Silken mouse enabled

I can post the whole file if necessary.

Connecting a modern USB mouse works and creates /dev/mouse0.  I think the old
mouse, even via the USB adapter, is not detected by udev.  At least I don't
see anything new under /dev after I plug it in.

Is there any way to get the old mouse working with Wheezy?  Thanks.