> I have searched all the archives back to 1998 (and at that point, I believe
> there was no support for the voyager anyway), and found nothing. Can anyone
> offer any pointers as to where I might find more info?

>> If I recall correctly, the mouse that comes with the Voyager uses a
>> different baudrate than other mice (4800, I think).  You have to change
>> the baudrate in the mouse driver in the kernel and recompile.

 Try add line "options SUN_MS_BPS=4800", rebuild your kernel. That may help.
details see ms(4).

-mochid