692169 - Intermittent checkerboarding on zoom that disappears when panned.

Status: RESOLVED WONTFIX

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

Description

[CoJaBo]

Tested on nightly 2011-10-05 using Droid X, screen resolution 480×854.
This is an intermittent checkerboarding display issue somewhat similar in appearance to Bug 681621, but this may not be related. (There is no faulty/erratic panning as in that bug, and the problem disappears when panned.)
Similar, though, was that this also took a while to locate a reproducible case, I've noticed this sporadically when zooming and occasionally when panning left/right on other sites since at least 8.0a or so.

Steps:
1. Switch to portrait mode.
2. Go to http://qdb.us/307110 (note: language)
The page displays correctly, as shown in Attachment 1 [details] [diff].
3. Double-tap to zoom-to-fit.
There is some page corruption shown in Attachment 2 [details] [diff].
4. Long press the huthuthut... nonsense to select it.
The page display is now significantly checkerboarded as shown in Attachment 3 [details] [diff].

Comment 1

[CoJaBo]

I've lost wifi access, the attachments probably won't be here til later tonight.

Comment 2

[CoJaBo]

Attachment: Step 2, displays correctly

Comment 3

[CoJaBo]

Attachment: Step 3, checkerboarded at bottom

Comment 4

[CoJaBo]

Attachment: Step 4, checkerboarded bottom and left

Comment 5

[Martijn Wargers (dead)]

Step 4 is probably bug 674405.

Comment 6

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

I was able to reproduce the issue.  Switching to new.  Need to take a look at other bugs as followup.

Comment 7

[CoJaBo]

This bug occurs randomly when panning or zooming even when not selecting text- it may be because of bug 674405 causing that particular movement on step 4, but I don't think it is otherwise related (bug 674405 makes no mention of checkerboarding).

Comment 8

[BMO Automation]

Closing all opened bug in a graveyard component