611369 - Screen goes white or gray when panning while large tap highlight is visible

Status: RESOLVED WORKSFORME

(Firefox for Android Graveyard :: Panning/Zooming, defect)

Description

[Matt Brubeck (:mbrubeck)]

Attachment: test case

Steps to reproduce:
1. Open Fennec in portrait orientation.
2. Load the attached test case.
3. Tap the link, and immediately (while the tap highlight is visible) start panning.

Expected results: Tap highlight disappears and page pans
Actual results: A large portion of the time, a portion of the page goes grey and a portion goes white; the page content disappears.

I've seen this in the wild, but I'm not sure exactly what circumstances trigger it.  It seems to happen only if the tap highlight extends past the edge of the screen, but that alone is not sufficient.

Comment 1

[Matt Brubeck (:mbrubeck)]

You can see this happening some in this YouTube video at 5:00-5:10: http://www.youtube.com/watch?v=PPl3jA9iMl4

With the new checkerboarding patch applied, the "gray" area now appears as checkerboard instead.

Comment 2

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

Hmm, I can't seem to repro using yesterday's nightly.

Comment 3

[Matt Brubeck (:mbrubeck)]

I'm still seeing this on trunk, especially when scrolling on http://i.engadget.com/ whenever I touch a link that overlaps the bottom edge of the screen.  I'll try to put together a more reliable test case.

Comment 4

[Matt Brubeck (:mbrubeck)]

I haven't seen this in a while on trunk.