PS2 -> USB magic

From: Nicolas Turro (Nicolas.Turro@sophia.inria.fr)
Date: Tue Jun 25 2002 - 12:27:20 EST


Hello,

on my laptop (compaq armada m300), i used to plug an usb mouse,
and it was 'seen' as a ps2 mouse by Xfree, without any usb module loading
(kernel 2.2.18, with custom configure options)

root@polaire# ls -l /dev/mouse /dev/psmouse
lrwxrwxrwx 1 root root 12 Jun 25 15:27 /dev/mouse ->
/dev/psmouse
crw-rw-rw- 1 root sys 10, 1 Jun 25 15:27 /dev/psmouse

and :
Section "InputDevice"
    Identifier "Mouse1"
    Driver "mouse"
    Option "Device" "/dev/mouse"
    Option "Protocol" "PS/2"
    Option "Emulate3Buttons"
EndSection

In my XF86Config ...
It was kinda magic....

Anyway, i compiled a 2.4.17 kernel (with more or less the same configure
options, but it was a pain for usb), and now the same 'magic' doesn't work....
I must use usbcore, hid, mousedev, uhci modules in order to use my usb
mouse...

Can someone explain me how it worked in 2.2.18 without those modules,
and is it possible to make the same magic work in 2.4.17 ?

Nicolas
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