959686 - [B2G] [Settings] Swiping to scroll the menu will move the scrollbar but not the menu options

Status: RESOLVED DUPLICATE of bug 958549

(Firefox OS Graveyard :: Gaia::Settings, defect)

Description

[Chris Kreinbring [:CKreinbring]]

Attachment: Log of unsynced Settings scroll

Description:
The first time the user swipes the screen to scroll the Settings menu, the scrollbar will move but the menu options will remain at the top for a few seconds.

Repro Steps:
1) Update Buri to Build ID: 20140113004002
2) Make sure the "Enable APZ for all content" is enabled in the Developer menu.
3) Close the Settings window and tap Settings.
4) Swipe upward to scroll the menu down and observe the relationship between the scrollbar and the menu options.

Actual:
On the first swipe of the Settings menu the scrollbar will move but the menu options will not.  After a few seconds the menu options will catch up to the scrollbar's position.

Expected:
The movement of the scrollbar and the menu options remain in sync.

Environmental Variables
Device: Buri 1.3 mozilla RIL
Build ID: 20140113004002
Gecko: http://hg.mozilla.org/releases/mozilla-aurora/rev/5bb1837de7c0
Gaia: b3fc4f712562ee92b0ed0bd17abc61be9a36a8da
Platform Version: 28.0a2
Firmware Version: V1.2-device.cfg

Notes:
Repro frequency: 100%
Link to failed test case: https://moztrap.mozilla.org/manage/cases/?filter-id=3680
See attached video clip and logcat logs

Comment 1

[Chris Kreinbring [:CKreinbring]]

Attachment: Video of unsynced Settings scroll

Comment 2

[Chris Kreinbring [:CKreinbring]]

Issue does not occur on Buri 1.2 mozilla RIL due to the fact that APZ does not exist on 1.2

Comment 3

[Chris Kreinbring [:CKreinbring]]

Attachment: Video of unsynced Settings scroll