[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #10 from Nate Graham  ---
It turned off again and hasn't turned back on, so maybe I was overthinking
things. I'll open a new bug if I find that it's turned on inappropriately
during normal use.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #9 from Peter Hutterer  ---
There's no toggle to turn it off right now. Best solution may be to keep
monitoring the touchpad and build up heuristics to make the guess whether it
wobbles or not more reliable. E.g. restore the old "not wobbling" check
together with the new "this is wobbling" check and then pitch the two against
each other.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #8 from Nate Graham  ---
Um, how do I turn it off then? It turned on quite before I did the small
circles routine; I only did that to illustrate the issue. I really don't like
how easy it is to accidentally turn this on.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

Peter Hutterer  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |NOTABUG

--- Comment #7 from Peter Hutterer  ---
Your device should have the hysteresis disabled by default. So by doing that
you're tricking the code into thinking you have pointer jitter and the wobble
detection code *enables* the hysteresis. You're defeating yourself here :)

Let me know if the hysteresis enables during a real-world use-case, because
that's something worth investigating.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #6 from Nate Graham  ---
> Is this a real use-case?

No, it's just the best way to quickly tell if hysteresis is on or off.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #5 from Peter Hutterer  ---
> if I continuously make small circles with the cursor

Is this a real use-case? You can trick the code (it's a result of how simple it
is) but I haven't been able to trigger this during normal interaction.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #4 from Nate Graham  ---
I understand. It's just frustrating to still be wrestling with this issue a
year and a half later, after the herculean effort you've put in to make it
work. Hysteresis is just so frustrating with my hardware that it makes me want
to chuck the computer out a window.

Anyway, I'm done grousing and am ready to help! :)

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

Peter Hutterer  changed:

   What|Removed |Added

 CC||peter.hutte...@who-t.net

--- Comment #3 from Peter Hutterer  ---
Except not really that much simpler. On/off isn't enough, you'll need to
provide some hysteresis range. Oh, now you need it per-axis because some
devices jitter on the y axis only. Oh, and you cannot ever switch away from the
hysteresis to something better because you promised that the configuration
exists. You cannot change the hysteresis algorithm, because config settings are
written in stone. Want to change from physical units to device units? Oops,
cannot do that without adding another option. And making sure you are
compatible between the two.

You also have to expose the config option, write a GUI for every desktop. Deal
with the corner-cases of toggling the config option at the 'wrong' time.

Then you have to teach users that that option exists. Where it is, in every
desktop and how to set it. In 3 years time, the ubuntu forums are full of posts
suggesting random config options that may not even exist anymore. 

And AFAICT neither windows or macos have that setting, so they're smart enough
to figure this out. Oh, and having the toggle to turn it off also stops us from
thinking about the correct solution.

An on/off switch makes things easy for the moment, for that one user that wants
it. It makes life a lot more difficult for maintainers. So please, let's stop
the talk of "just add a config option" because yes, for you it would've been
easier (right now). For me and a lot of others, it's just a long-term waste of
time.

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #2 from Nate Graham  ---
I can't help but notice that a simple on/off switch would probably have been a
heck of a lot simpler: less code, higher reliability, and no regressions for
anyone, instead of this push-pull between people with good hardware who don't
want hysteresis, and those with crappy hardware who do. We'd probably have had
this issue solved long ago, rather than playing whack-a-mole with it into the
foreseeable future.

And now I promise that will be my last comment on the subject in this bug
report. :)

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[Wayland-bugs] [Bug 105472] Hysteresis inappropriately turned back on for my hardware after being off for months

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105472

--- Comment #1 from Nate Graham  ---
git-bisect shows that the culprit was e43bd4ae3a75f72b45c6bab6168bd859ab4a01b3
(plus e8dffbd73a1b3c17716f972f210e420de94028c2, obviously).

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