Bug 122160

Summary:	Scrolling broken on Lion after r156793
Product:	WebKit	Reporter:	dykstrad
Component:	CSS	Assignee:	Tim Horton <thorton>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	andersca, ap, rc, rpgrant, simon.fraser, thorton
Priority:	P1
Version:	528+ (Nightly build)
Hardware:	Mac (Intel)
OS:	OS X 10.7
URL:	http://www.apple.com

dykstrad

Reported 2013-10-01 09:01:02 PDT

Since I updated Webkit two versions ago I have been noticing some graphical issues on some major sites. On store.apple.com, if you scroll the page you'll notice the phone, account and cart icons stay static when they are not supposed to. This bug is also seen on http://www.apple.com/mac, the little arrow that points to Mac Applications Accessories Server stays static. If you manually disable any css transitions on these objects it seems to stop them from scrolling with the page. A bigger example is to try to scroll the page when watching a youtube video you'll notice that you can't see the rest of the comment on a video, and that the video itself doesn't scroll with the page properly.

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dykstrad

Comment 1 2013-10-04 08:10:06 PDT

Recent release have changed this behaviour. Now the apple page won't scroll at all, same with the youtube page. Seems like scrolling does't scroll any content on any page.

Rüdiger Cordes

Comment 2 2013-10-05 00:20:24 PDT

Yes, there is no scrolling at all.

Alexey Proskuryakov

Comment 3 2013-10-08 10:22:06 PDT

*** Bug 122463 has been marked as a duplicate of this bug. ***

Alexey Proskuryakov

Comment 4 2013-10-08 10:36:49 PDT

I cannot reproduce this on Mountain Lion. Perhaps 10.7-only?

Tim Horton

Comment 5 2013-10-08 11:11:11 PDT

This is probably due to the DrawingAreaImpl removal

Simon Fraser (smfr)

Comment 6 2013-10-08 13:11:33 PDT

dykstrad, did you at any point use the Debug menu to change drawing/compositing settings?

Rüdiger Cordes

Comment 7 2013-10-08 13:52:07 PDT

There are 6 menu items to check. That means 64 combinations are possible. When Disable Accelerated Compositing is checked in the window happens nothing when scrolling with the mouse. Otherwise the scroll bar shows normal behavior but the content does nothing. Yes it seems to be a 10.7.x problem. In 10.8.5 with the newest nightly (r157091) is no problem.

Tim Horton

Comment 8 2013-10-08 13:59:21 PDT

Alexey and I are looking at this.

Tim Horton

Comment 9 2013-10-08 17:05:47 PDT

http://trac.webkit.org/changeset/157143

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