1425232 - Overscoll broken when using a touchscreen

Status: RESOLVED WORKSFORME

(Core :: Panning and Zooming, defect, P3)

Description

[Jos635]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20171206182557

Steps to reproduce:

1. Enable overscroll by setting apz.overscroll.enabled to true
2. Try scrolling on a page using a touchscreen


Actual results:

1. When 'flicking' down a page, so that the page is still scrolling down when releasing your finger, the page will scroll back up a bit after the page stops scrolling down.
2. When scrolling slowly, the page will scroll faster than that your finger is moving. Additionally, when releasing your finger the page scrolls back in the other direction a bit.

I ran mozregression, and the bug seems to have been introduced here: https://hg.mozilla.org/integration/autoland/json-pushes?changeset=826766a15d6acdedb61209157f9febcfd142b75e&full=1 (Bug #951793)


Expected results:

Smooth scrolling.

Comment 1

[Botond Ballo [:botond]]

apz.overscroll.enabled is not a supported configuration on desktop platforms.

It is something we want to enable eventually (bug 1393102). I think it makes sense to keep this bug open and mark it as blocking bug 1393102, so that when we do support overscrolling on desktop we make sure it's fixed.

Comment 2

[Hiroyuki Ikezoe (:hiro)]

I tested on a dell laptop having a touchscreen with Windows 11 pro. It looks like overscrolling works properly.

Hello jos635, would you mind trying the latest release version of Firefox with enabling apz.overscroll.enabled?

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Redirect a needinfo that is pending on an inactive user to the triage owner.
:botond, since the bug has recent activity, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Botond Ballo [:botond]]

Closing as WORKSFORME per comment 2. Please feel free to reopen if you're still seeing this.