[Wayland-bugs] [Bug 103960] libinput trackpad zoom too sensitive

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103960

--- Comment #2 from Mikko Rapeli <mikko.rapeli at iki.fi> ---
Hmm. Both web and file browsers suffer from this on my Xfce desktop. It feels
the same on a number applications: from Thunar to Nautilus to Firefox to
Chromium.

All behave in same so I suspect the input SW stack is the same and libinput is
somewhere there too.

As a user it feels like something is adding an invisible weight to the scroll
motion and this keeps weight keeps rolling after the movement on trackbad had
ended. If I swipe a bit harder and faster and then later on press ctrl key, all
of the apps suddenly combine the delayed scroll weight roll and ctrl key press
as brand new ctrl key plus scroll event.

But they are not the same input gesture. They are separate. There a few tens if
not hundreds of milliseconds between stopping scroll movement on track pad to
when ctrl is pressed.

I think something in the SW stack, maybe libinput, could separate these two
gestures. Or maybe there is way to change the weight of the virtual scroll ball
to reduce the fly wheel effect where it keeps going long after my finger lifted
from trackpad.

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