1179320 - Screen should fade to black rather than sharp power off

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: General, defect)

Description

[Sheeri Cabral [:sheeri]]

quoting from the mailing list:

Question: are you trying to power off?  Or are you sleeping the device?  Personally, I would rather have the instant black out which helps save on power when I sleep the phone by tapping on the power button.   Perhaps we can make this an option?

Comment 1

[:Atoll]

When the phone screen times out, not when I'm pressing the button but just when it's sitting idle, it just crashes straight to black without any fade whatsoever. This makes me think the phone just crashed and rebooted. iOS does an intermediate 'dim' state for a brief time before powering off the screen, which may help.

But in general, for the same reason we fade in and out the search bar at the top, I would rather the phone fade in from and out to black screen rather than just hard cuts. Even just a quarter second of fade. It helps distinguish "normal behavior" from "crashed" and "ran out of battery".

Comment 2

[Sheeri Cabral [:sheeri]]

Interestingly, my phone does fade after 50 seconds and goes to black after 60 seconds. I tested this behavior both plugged in and charging, and on battery only (47% full).

Settings that might be relevant: I have my timeout set to 1 minute, brightness set manually.

Comment 3

[Dave Hylands [:dhylands]]

I checked on my flame and z3c and both seem to have the same behaviour.

After 50 seconds it starts to fade. It then fades for about 3 seconds to some dimmer value between being off and on. It then stays at that particular brightness for an additional 7 seconds at which point it turns off.

Comment 4

[Martijn Wargers (dead)]

Also it would be nice that when you tap the power button to turn the screen on, that it would appear instantly, instead of the 300ms delay I seem to be getting, which makes it appear rather sluggish.

Comment 5

[Pi Wei Cheng [:piwei] (inactive)]

There's no STR for this bug so I'm just reporting what I see on Aries.

When pressing hardware power button when on Homescreen: Screen turns off immediately without fading effect.

When sitting idle on Homescreen: Screen dims when reaching 50 seconds, and turns off when reaching 60 seconds. This is true when timeout is set to 1 minute, and display brightness set to auto or manual.

USB cabled was not connected during the tests.

Tested on:
Device: Aries (dogfood debug build)
BuildID: 20150721153949
Gaia: 805cf546729ba742bf23febda52970fcb35c0e8f
Gecko: 512c7e8f0030
Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd
Version: 42.0a1 (2.5 Master) 
Firmware Version: D5803_23.1.A.1.28_NCB.ftf
User Agent: Mozilla/5.0 (Mobile; rv:42.0) Gecko/42.0 Firefox/42.0

Comment 6

[KTucker [:KTucker][Inactive 3/4/2016]]

It is the same behavior on Flame master as stated in Comment 5 but I did not notice that when on the lockscreen there is no dim before going sleep. It just goes to sleep.

Environmental Variables:
Device: Flame 2.5 (Full Flash)(KK)(319mb)
BuildID: 20150721010202
Gaia: 4fe0507781f3ed56c8ae5e66dd9489165d1ff68e
Gecko: 3a4bfa5d2d02
Gonk: 41d3e221039d1c4486fc13ff26793a7a39226423
Version: 42.0a1 (2.5) 
Firmware Version: v18D
User Agent: Mozilla/5.0 (Mobile; rv:42.0) Gecko/42.0 Firefox/42.0

Comment 7

[:Atoll]

To clarify, the screen does *turn off* as it should after the timer expires. However, it turns off *instantly*, either from full brightness (at the lock screen) or from dim brightness (at the home screen).

I'm requesting that it turn off gradually (over a fraction of a second), rather than hard-cut from "whatever the current brightness is" to fully powered off.

I did observe, while testing with a 1 minute timeout, that the following sequence occurs:

00-50: Screen at full brightness
50-59: Screen dims, gradually, from full brightness to dim brightness
60: Screen powers off

And I'm suggesting that 60 should instead read:

60: Screen dims, gradually, from dim brightness to powered off.

Comment 8

[BMO Automation]

Firefox OS is not being worked on