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Issue 749723 link

Starred by 1 user
Status: Duplicate
Merged: issue 717205
Owner: ----
Closed: Jul 2017
Cc:
adlr@chromium.org
rbyers@chromium.org
sahel@chromium.org
dtapu...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 2
Type: Bug



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No fling velocity on many pages on ChromeOS

Reported by espr...@gmail.com, Jul 27 2017 
UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9592.42.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.52 Safari/537.36

Example URL:
https://www.google.com/search?site=&source=hp&q=example

Steps to reproduce the problem:
1. On a chromebook go to https://www.google.com/search?site=&source=hp&q=example and fling up and down on the track pad.
2. Scrolling stops immediately, there's no velocity most of the time.
3. Visit https://en.wikipedia.org/wiki/Cat
4. Try fling, you get a nice automatic scrolling motion with physics on this page.

What is the expected behavior?
Scrolling should always have some velocity and settle.

What went wrong?
Lots of pages seem to have a fling curve such that scrolling stops immediately when lifting your finger. 

This seems like it might be some bug that happens as you interact, for example image search:
https://www.google.com/search?q=example&source=lnms&tbm=isch&sa=Xbiw=1600&bih=834

I did a fling or two and things seemed okay, but then they got stuck and now I get no velocity when scrolling.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes Not sure.

Does this work in other browsers? Yes

Chrome version: 60.0.3112.52  Channel: n/a
OS Version: 9592.42.0
Flash Version: Shockwave Flash 26.0 r0

Comment 1 by rbyers@chromium.org, Jul 28 2017

Cc: sahel@chromium.org dtapu...@chromium.org rbyers@chromium.org adlr@chromium.org
Components: -Blink Blink>Input
Thanks for the bug report Elliott (I haven't seen nearly enough from you lately!).

The first page seems too short for me to be able to reproduce, but on the image search page I think I can occasionally see this.  If I repeatedly do small flings up and down occasionally I see the motion come to a sudden stop.

Elliott, does this match the behavior you're seeing?  Or are you saying that you consistently don't get any fling whatsoever on some pages?

To input-dev first since I'm guessing some interaction with the wheel listener, maybe related to scroll-latching work.  But cc adlr incase he's aware of any lower-level CrOS fling issue.

Comment 2 by rbyers@chromium.org, Jul 28 2017

Summary: No fling velocity on many pages on ChromeOS (was: No fling velocity on many pages)
In case it matters, which device was this?  I was trying to repro on an original Chromebook Pixel.

Also I'm assuming the difference between pages where it works and those that don't is the presence of a wheel/mousewheel listener.  I suspect that enabling chrome://flags#passive-listener-default would work around the problem (at the cost of breaking a few pages).

Comment 3 by adlr@chromium.org, Jul 28 2017 

This may be a dup of  Issue 717205

Comment 4 by rbyers@chromium.org, Jul 28 2017

Mergedinto: 717205
Status: Duplicate (was: Unconfirmed)
Right, sure sounds like it (sorry I forgot about that one).
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