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Re: synaptics vs libinput and GNOME 3.20 no longer supporting synaptics

On Tue, 2016-07-12 at 07:48 +0300, Lars Wirzenius wrote:
> After Raphael's mail yesterday, I switched from the synaptics driver
> to the xinput one (by removing xserver-xort-input-synaptics) and
> since then, I've not had a single case of moving the mouse or
> clicking by tapping by accident. When the opposite change happened a
> few weeks ago, the accidents started happening with such frequency
> that I could barely finish a sentence in the same window I started
> it.

For me at least the problem isn't palm detection, because in the end
it's a kludge that can at best only partially work.  For synaptics the
solution for this is syndaemon, and the problem it's broken right now:


Maybe libinput does the typing detection syndaemon does, but I can't
find any evidence for it.

> Tapping and two-finger scrolling work perfectly fine with the xinput
> driver, too.

As a touchpad that doesn't move the mouse as I type is hugely
attractive, I tried libxinput again.  Same result.  Palm detection
works wonderfully, but only because it doesn't recognise a tap from
finger either.  Clicking (ie a tap heavy enough to activate the
mechanical switch underneath) does work.

If I configure synaptics to ignore TapButton1 taps (as opposed to
clicks), it also has faultless palm detection.

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