[Bug 205690] [psm] [patch]: Add support for Elantech trackpads

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Sun Oct 2 13:14:42 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205690

--- Comment #79 from Jakob Alvermark <jakob at alvermark.net> ---
(In reply to Vladimir Kondratyev from comment #78)
> (In reply to Jakob Alvermark from comment #77)
> 
> > Yes, this restores the previous behavior, i.e. the buttons work again.
> 
> That is nice!

Could we get this committed? It would be a POLA violation for ThinkPad users if
we don't.


> > One other thing I would like to change though, setting
> > hw.psm.synaptics.touchpad_off=1 disables the touchpad/clickpad
> > as expected, but it also turns on the buttons.
> > This was also the case pre-r306355.
> > I almost exclusively use the trackpoint, so I would like to be
> > able to turn the touchpad off, but keep the buttons working.
> 
> Try following hack:
> # sysctl hw.psm.synaptics.min_pressure=255

That actually does what I want, thanks for the hint!


> > Never had this problem before. I have been using this hardware for months,
> > tracking HEAD. It seems to work now, with the patch applied and no debug on.
> > I'll keep running it with this patch and see what happens.
> 
> psm driver reinitializes touchpad within few seconds if sync loss has been
> detected. So it is possible that you just did not notice this.

I am quite sure I would have noticed if the mouse pointer would stop moving
until I rebooted the machine.

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