984300 - [Flame]Tap screen will show ripple spot

Status: RESOLVED FIXED

(Firefox OS Graveyard :: Vendcom, defect)

Description

[Mike Lien[:mlien]]

Attachment: VID 0002.mp4

[Device]
  Flame
---------------------------------------------
[Reproduction build] - Mozilla Central - V1.4
  Gaia      567608949aefd9f6da9d4c6c5bc9d0d3f8b6c402
  Gecko     30a028c84f581e5ae6397141e82dde1fc6a6410f
  BuildID   20140220211338
  Version   28.0
---------------------------------------------
[Reproduce Steps]
  1. Put phone on pocket or other places for a long time
  2. Unlock screen and tap screen
---------------------------------------------
[Expected Result]
  Screen show normally
---------------------------------------------
[Actual Result]
  Tap screen will show ripple spot on the center of screen
  Please refer to attachment
  Now only one phone has this problem

Comment 1

[Francis Lee [:frlee]]

this potential single device issue (DVT sample) has been shipped back to T2M. wait for Yanan's feedback on this.

Comment 2

[Tony Zhao]

Attachment: Verify result in Shanghai

We have just received the device from US but not able to reproduce this issue on our side, please check the attached video

Comment 3

[Tony Zhao]

The analyze result from our mechanical Engineer for this issue: 
We analyze that it may caused by low pressure. There is a sealing gap between TP and LCD, when the inside air exhausted，it may cause low pressure in the gap, then it’s easy to cause waterwave when pressed. 
we already increased a air exhaust hole in the foam between TP and LCD during PVT stage, so the problem will not appear again in PVT samples.

Comment 4

[Francis Lee [:frlee]]

hi Danny/Mike,

please help to verify this issue with PVT sample.

Comment 5

[Danny Liang [:dliang]]

(In reply to Francis Lee [:frlee] from comment #4)
> hi Danny/Mike,
> 
> please help to verify this issue with PVT sample.

The result is positive, I didn't see any ripple spot on PVT sample.

Comment 6

[Francis Lee [:frlee]]

hi Danny,

thank you for your confirmation. This issue only happened on a single DVT. PVT has no such issue. issue closed.