x11: howto disable rogue touchpad?

O. Hartmann ohartman at zedat.fu-berlin.de
Tue Sep 29 04:22:26 UTC 2015

On Mon, 28 Sep 2015 17:33:11 -0700
David Noel <davidinoel at gmail.com> wrote:

> How recently did you upgrade?

On a daily basis

> When did this start?

Since I purchased that crap (Lenovo). It is not restricted to this model. Even
the better-quality X240, which I use at work and sometimes with FreeBSD, does
have the same issue. The much cheaper, more plastique version of that touchpad
is in builtin in E540, L540 and some others and the fun part is: someone can
provoke ghostmovement by putting hot objects in the vicinity of the touchpad. 

Typing, for instance, a text for a report, with hands layed down on the
chassis, turns into a horror: while typing, suddenly you get close enough to
the touch thing and suddenly the carret jumps randomly into another portion of
the text. That happens in editors running in X11/windowmaker or any other WM I
tried so far. 

As polytropon stated earlier, just disabling PS/2 was one of my first thoughts,
so I disabled support in the kernel. But since the Lenovo's keyboard is also(!)
PS/2 (not USB), I lost keyboard, too.

A while ago, I also tried some recommendations I digged from the net - without
success. I think I still mess up with the HAL support and the weird, mostly
not-well documented way to enable/disable/configure devices, device support in
its XML synatax.

By the way, I try to avoid HAL. This may also cause some problems when trying

By the way - some companies around I have contact, too, also complained
massiveley on that crappy touchpad - it goes up even to the high-class
notebooks from Lenovo. The recently issued lines do not have that crap anymore:
X250, E550, L550, W550 have a nice touchpad with the buttons separeted again
and very accurate function. But: on larger notebooks, the warm hands laying
down on the touchpad do the same ghostmovement as described above - but a
little less inflicting.

> On 9/28/15, O. Hartmann <ohartman at zedat.fu-berlin.de> wrote:
> > Using most recent CURRENT with up-to-date ports and X11 on a Lenovo
> > ThinkPad E540, I fight with the world biggest crap ever invented - the
> > Lenovo TouchPad! Fighting with ghost moves of the mouse, ghost-cut-and
> > paste, ghost jumps, I'm about to physically rip of that crap out of the
> > notebooks chassis!
> >
> > I seek a way to disable that touchpad. The crap EFI firmware of that
> > series (which seems a reduced form of the firmware of more expensive
> > types) doesn't allow me to disable the touchpad. So there must be found
> > a solution via X11.
> >
> > Does anyone do have a solution? Please contact me (set me CC, I do not
> > subscribe the list).
> >
> > Thanks in advance,
> >
> > oh
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