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SubjectRe: i8042 controller on Toshiba Satellite P10 notebook - patch
On Apr 4, 2005 4:51 PM, Jaco Kroon <> wrote:
> Dmitry Torokhov wrote:
> > On Apr 4, 2005 3:35 PM, Jaco Kroon <> wrote:
> >
> >>As for loading the modules i8042, atkbd and psmouse (in that order):
> >>black void of death.
> >>
> > Hmm.. remind me, if you boot with usb-handoff does it switch the i8042
> > into active multiplexing mode (you get 4 AUX serio ports)?
> >
> Checking my logs it actually looks like usb-handoff did get 4 ports.
> With my patch, however, I only get:
> serio: i8042 AUX port at 0x60,0x64 irq 12
> serio: i8042 AUX port at 0x60,0x64 irq 1

Ok, try booting with "usb-handoff i8042.nomux". If that cures
death-on-reboot problem then Vojtech already has a patch in

> >From the code I understand that this means that i8042_nomux != 0 or
> i8042_check_mux() return != 0. So I assume that with the patch that
> check_mux returns non-zero (and reversed logic means that 0 implies the
> check succeeds, ie, it _fails_ with my patch installed). I don't know
> which is the prefered mode of operation though (I guess MUX with 4 AUX
> ports?).

Yes, with 4 ports your external mouse is independent from the touhpad.
When you have only 1 port you can't use touchpad's extended mode
together with an external mouse.

> With my patch I do get the ALPS support though - something which I
> didn't get with usb-handoff, nor with acpi=off, nor with simply hacking
> out the AUX_LOOP and AUX_TEST tests and just assuming the hardware is
> there (I saw ALPS yesterday for the first time in my life for that matter).

Hmm, I'd like to debug that once we resolve reboot problems.

> OT: I think I prefer synaptics multi-finger tapping to the tapping in
> specific locations to get right and middle clicking, but that is another
> story that probably has nothing to do with the kernel, and quite likely
> something that is configurable in the synaptics xorg driver.

You should be able to control that in xorg.conf.

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