Re: forcing PS/2 USB emulation off

Dmitry Torokhov
2004-10-18T03:48:21Z

On Sunday 17 October 2004 02:34 pm, Alexandre Oliva wrote:
> To get the touchpad to work on my Compaq Presario r3004 notebook, in
> addition to ALPS Touchpad patches by Dmitry Torokhov, I needed a patch
> by Vojtech Pavlik that disabled PS/2 USB emulation early in the boot.
> The BIOS didn't have an option to disable it, and, without it, PS/2
> mouse detection wouldn't find anything and, if psmouse is built into
> the kernel, as it happens to be the case for Fedora Core kernels,
> there's no way to re-probe.

Actually, now there is. Starting with 2.6.9 it is possible to force
either rescan or reconnect for devices connected to serio ports:

echo -n "reconnect" > /sys/bus/serio/devices/serio1/driver

should cause re-probe. Just FYI. As Greg said the USB handoff patch
is in -mm three and should take care of most of the issues.

BTW, I think that handoff should be activated by default. I am lurking
in Gentoo forums and there are coultless people having problems with
their mice/touchpads detected properly unless they load their USB drivers
first.

--
Dmitry