Re: 2.6.9-rc2-mm4

Vojtech Pavlik
2004-10-01T18:26:36Z

On Fri, Oct 01, 2004 at 11:01:01AM -0700, Greg KH wrote:
> On Fri, Oct 01, 2004 at 12:30:39AM -0500, Dmitry Torokhov wrote:
> > On Thursday 30 September 2004 07:05 pm, Andrew Morton wrote:
> > > > One other question. Isn't /dev/input/mice supposed to be a multiplexor
> > > > for mice ? I think I remember some time when I could have both a PS2 and
> > > > a USB mouse connected and X pointer followed both. Now if I boot with the
> > > > USB mouse plugged, the PS2 one does not work. If I boot with usb unplugged
> > > > and plug it after boot, both work; usb mouse works fine, and PS2 just
> > > > jumps half screen each time I move it, and with big delays.
> > > >
> > >
> >
> > I bet it's USB legacy emulation topic again. Try loading USB modules first
> > and then psmouse, should help.
> >
> > Vojtech, what is the status of USB handoff patches. I have seen several
> > variants and so far heard only success stories from people using them. Can
> > we have them in kernel proper?
>
> They are already in the -mm tree, but they need to be explicitly enabled
> with a boot command line option to have the handoff happen.

I think we really need them by default. I had seven bugs with touchpads,
lost synchronization with PS/2 mice and similar fixed just by enabling
this patch unconditionally in the SuSE tree.

As far as I know, there are only a few nForce boards where enabling the
patch hurts - we should be able to do a DMI exception for those. Anyway,
those boards have bigger problems, as USB reportedly doesn't work there
(because the USB drivers do the same handoff).

--
Vojtech Pavlik
SuSE Labs, SuSE CR