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

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

--- Comment #78 from Vladimir Kondratyev <wulf at cicgroup.ru> ---
(In reply to Jakob Alvermark from comment #77)

> Yes, this restores the previous behavior, i.e. the buttons work again.

That is nice!

> 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

> 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.

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