1188602 - Janky scrolling and bad repainting during APZ scrolling

Status: RESOLVED DUPLICATE of bug 1157708

(Core :: Panning and Zooming, defect)

Description

[Kartikaya Gupta (email:[e-mail])]

Reports of the following pages scrolling really jankily and with repainting issues on Windows with APZ and Flash activated. I couldn't reproduce on OS X but I haven't tried Linux or Windows yet.

http://breakingmuscle.com/mobility-recovery/4-safe-and-effective-ways-to-work-out-with-a-cranky-knee
https://nationalvetcontent.edu.au/alfresco/d/d/workspace/SpacesStore/608b839e-426a-463b-ae12-1cd060c5258a/ims/fit007_2_lr1/fit007_2_lr1_8_2.htm
http://physicalliving.com/how-to-stabilize-your-shoulders-during-the-pullup-exercise/

Comment 1

[Emanuel H.]

I cant't see any scrolling issues on those sites on Windows 8.1 and latest Nightly except flickering of the flash content itself (bug 1157708).

Comment 2

[Vladan Djeric (:vladan)]

(In reply to Emanuel H. from comment #1)
> I cant't see any scrolling issues on those sites on Windows 8.1 and latest
> Nightly except flickering of the flash content itself (bug 1157708).

The scrolling issues go away when Flash is disabled, so this is indeed bug 1157708.

I did also notice when scrolling the *.edu.au page in e10s Nightly on Windows that the last paragraph slightly "shifts" when scrolling reaches the bottom of the page. I could reproduce it on a second e10s profile but not in single-process Nightly. Do you guys see it? Turn Flash off to test.

Comment 3

[Vladan Djeric (:vladan)]

I still see serious choppiness when mouse-scrolling this page with Flash enabled, regardless of e10s vs single process, or one running Firefox or multiple.
Toggling APZC fixes it though.

http://physicalliving.com/how-to-stabilize-your-shoulders-during-the-pullup-exercise/

Tested on latest Nightly on Windows 7.

Comment 4

[Kartikaya Gupta (email:[e-mail])]

If I'm understanding comment 3 correctly, there's jank on that page which APZ fixes, so there's no bug there. And based on comment 2 the original issue reported is the same as bug 1157708. So duping.