1557761 - Content jumping at the end of scroll with document splitting and parent process retained display lists

Status: RESOLVED DUPLICATE of bug 1554985

(Core :: Graphics: WebRender, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

I noticed a couple of content jumps while scrolling on http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20190603/thread.html

I wasn't reliably able to reproduce the problem but it definitely happened me a couple of times. I only started noticing it today.

Comment 1

[Mayank Bansal]

(In reply to Jeff Muizelaar [:jrmuizel] On leave until June 17 from comment #0)

I noticed a couple of content jumps while scrolling on
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20190603/thread.html

I wasn't reliably able to reproduce the problem but it definitely happened
me a couple of times. I only started noticing it today.

Does the content jump for you if from the page you open multiple links in background, and while the tabs are loading, you try to scroll the page?
I see similar issue on bugzilla page

Comment 2

[Jeff Muizelaar [:jrmuizel]]

I don't recall there being tabs loading in the background but it could be possible.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

Yeah, I think there is something about things loading in the background.

Comment 4

[Mayank Bansal]

This is not a recent regression..I have been seeing something similar for the past 2 months atleast.
Didnt file a bug as I didnt have exact STR. And when I tried a screen-recorder, the STR didnt work

Comment 5

[Jeff Muizelaar [:jrmuizel]]

The problem I'm seeing only seems to happen when I have gfx.webrender.split-render-roots turned on.

Comment 6

[Jeff Muizelaar [:jrmuizel]]

It's pretty reproduceable on this page: https://www.wired.com/2007/09/dayintech-0907/

Comment 7

[Jeff Muizelaar [:jrmuizel]]

This was regressed by bug 1413546.

Comment 8

[Jeff Muizelaar [:jrmuizel]]

This could be a dup of 1554985