Bug 71317

Summary:

Horizontal scrolling sometimes scrolls half an image

Product:

WebKit

Reporter:

Mark Dalrymple <markd>

Component:

New Bugs

Assignee:

Nobody <webkit-unassigned>

Status:

UNCONFIRMED

Severity:

Normal

CC:

ap, mehmet.sahin, simon.fraser

Priority:

Version:

528+ (Nightly build)

Hardware:

Mac (Intel)

OS:

OS X 10.6

Attachments:

Description	Flags
Screen recording showing the above happenings	none

Mark Dalrymple

Reported 2011-11-01 14:00:43 PDT

Created attachment 113210 [details] Screen recording showing the above happenings The Chromium folk asked me to re-post this here. It's their bugID 102368 : http://code.google.com/p/chromium/issues/detail?id=102368 What steps will reproduce the problem? 1. Visit Google Reader 2. Have "Comics Curmudgeon" in your feed 3. Scroll so a comic is around the middle of the screen 4. two-finger-scroll horizotnally What is the expected result? It scrolls in one piece What happens instead? Scrolls piecemeal. Please provide any additional information below. Attach a screenshot if possible. Attached a screen movie showing what I'm seeing.

Attachments
Screen recording showing the above happenings (5.04 MB, video/quicktime) 2011-11-01 14:00 PDT, Mark Dalrymple	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Alexey Proskuryakov

Comment 1 2011-11-01 21:37:35 PDT

Per comments in the chromium bug this also happens in WebKit nightlies using Safari. Quite an unusual effect.

Simon Fraser (smfr)

Comment 2 2011-11-01 22:45:28 PDT

Probably compositing/tiled layer stuff.

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