1158084 - [Nexus 5][Camera] The Camera's flashlight will flash for a monment in card view.

Status: RESOLVED INVALID

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

Description

[SandKing]

Attachment: Bug log: logcat_0459.txt

[1.Description]:
[Nexus 5][v2.2&v3.0][Camera]Enable flashlight in Camera, and complete a focus. Then enter taks manager, and tap "Camera"  in card view. The flashlight  will flash for a monment.
Found Time:04:59
See log: "logcat_0459.txt"
See video: "0459.mp4"

[2.Testing Steps]: 
1.Launch "Camera"
2.Enable flash on.
3.Tap lightly on the view finder 
4. After focused, long press "Home" key 
5.Tap on the "Camera " in card view

[3.Expected Result]: 
5.The fllashlight should not  flash for a monment

[4.Actual Result]: 
5.The flashlight  will flash for a monment

[5.Reproduction build]: 
N5 v2.2 build(Affected):
Build ID               20150423002502
Gaia Revision          b838d0e7c163e66660dcb6e387d8339944a7a30e
Gaia Date              2015-04-23 02:32:46
Gecko Revision         https://hg.mozilla.org/releases/mozilla-b2g37_v2_2/rev/8dce56574f28
Gecko Version          37.0
Device Name            hammerhead
Firmware(Release)      5.1
Firmware(Incremental)  eng.cltbld.20150423.035409
Firmware Date          Thu Apr 23 03:54:27 EDT 2015
Bootloader             HHZ12f

Nexus_5 3.0 build(Affected):
Build ID               20150423160207
Gaia Revision          0c5e2ee1173f3c53379ef3cd10de714836258fe8
Gaia Date              2015-04-23 16:10:10
Gecko Revision         https://hg.mozilla.org/mozilla-central/rev/22a157f7feb7
Gecko Version          40.0a1
Device Name            hammerhead
Firmware(Release)      5.1
Firmware(Incremental)  eng.cltbld.20150423.192918
Firmware Date          Thu Apr 23 19:29:36 EDT 2015
Bootloader             HHZ12f

FLame 2.2(Unaffected):
Build ID               20150423002502
Gaia Revision          b838d0e7c163e66660dcb6e387d8339944a7a30e
Gaia Date              2015-04-23 02:32:46
Gecko Revision         https://hg.mozilla.org/releases/mozilla-b2g37_v2_2/rev/8dce56574f28
Gecko Version          37.0
Device Name            flame
Firmware(Release)      4.4.2
Firmware(Incremental)  eng.cltbld.20150423.035703
Firmware Date          Thu Apr 23 03:57:16 EDT 2015
Bootloader             L1TC000118D0

Flame 3.0(Unaffected):
Build ID               20150423160207
Gaia Revision          0c5e2ee1173f3c53379ef3cd10de714836258fe8
Gaia Date              2015-04-23 16:10:10
Gecko Revision         https://hg.mozilla.org/mozilla-central/rev/22a157f7feb7
Gecko Version          40.0a1
Device Name            flame
Firmware(Release)      4.4.2
Firmware(Incremental)  eng.cltbld.20150423.193607
Firmware Date          Thu Apr 23 19:36:18 EDT 2015
Bootloader             L1TC000118D0

[6.Reproduction Frequency]: 
occasionally Recurrence,8/10

[7.TCID]: 
Free Test

Comment 1

[SandKing]

Attachment: Bug video: 0459.mp4.MP4

Comment 2

[Hermes Cheng (inactive after July 27, 2015)]

I also found that when the flash turn on, the focusing would trigger the flash light.
The flash light would flash at below step 3 and step 4.

* My STR:
1.Launch "Camera"
2.Enable flash on.
3.Tap lightly on the view finder to trigger focusing
4.After focused, long press "Home" key to trigger Card View

Hayden, could you take a look?

Comment 3

[Hayden Huang [:haydenh]]

with some investigation, I found that flash light is controlled by device specific library. We only set flash light mode and rely on device to do the rest (to actually turn on/off the light). In this case, it is the behaviour of nexus-5 driver, which I can see the same behaviour on Android 5.1 too. There is a timing gap in nexus-5 driver that if you quickly close camera app after flash, it will flash again.

Comment 4

[Hermes Cheng (inactive after July 27, 2015)]

I tried Nexus 5 with Android 5.1 and got the same behavior at comment 3.
Close this bug as an invalid one.