Rebuild your kernel
and reboot. As always, I would recommend saving /kernel to /kernel.stable before
trying out the new kernel. It's a handy thing to have around anyways.
Add the following line to /etc/rc.conf which enables the mouse on all
virtual terminals:
allscreens_flags="-m on"
I don't think I forgot anything, but if I did please let me know :)
-- Benn
References and man pages
Benn recommends the following man pages:
usb(4)
usbd(8)
usbd.conf(5)
usbdevs(8)
ums(4)
If you have X11 pointed at sysmouse, then this will work just fine. And it will
support plugging/unplugging the mouse at runtime without the need of a manual HUP.
Addenda
You have to do this:
vidcontrol -m on
to actually enable it on the terminal. Alexander Anderson said he found this
piece of info on the man page for moused(8) by accident. He also suggested step 6
above.