788406 - [Otoro] Phone should boot up with highest brightness

Status: RESOLVED INVALID

(Firefox OS Graveyard :: GonkIntegration, defect)

Description

[Tim Guan-tin Chien [:timdream] (please needinfo)]

The default setting of screen brightness is 1. Currently the phone boots up with brightness = 0.5, which results the screen suddenly being turn bright when the phone enters Gaia.

Comment 1

[Marco Chen [:mchen]]

The first brightness is controlled by bootloader for splash screen then it will be adjusted by OS according to user setting. 
If you want brightness to be 1 on the beginning of boot up then it should change the code on bootloader. But this seems be not related on B2G.

Comment 2

[Tim Guan-tin Chien [:timdream] (please needinfo)]

(In reply to Marco Chen [:mchen] from comment #1)
> The first brightness is controlled by bootloader for splash screen then it
> will be adjusted by OS according to user setting. 
> If you want brightness to be 1 on the beginning of boot up then it should
> change the code on bootloader. But this seems be not related on B2G.

Then let's change the code in bootloader?

Comment 3

[Marco Chen [:mchen]]

The images including linux kernel and bootloader are provided by Vendor. As I know we have no sources code to do modification.

By the way, normally device didn't configure backlight to highest on bootloader.
This is for power management.
If we set backlight to highest on bootloader then device may be forced to shutdown due to the state of battery too low even user already set backlight to lowest on user setting.

Note that the backlight setting is fixed on bootloader and not sync with user setting.
So this should not be a bug.

Comment 4

[Tim Guan-tin Chien [:timdream] (please needinfo)]

(In reply to Marco Chen [:mchen] from comment #3)
> The images including linux kernel and bootloader are provided by Vendor. As
> I know we have no sources code to do modification.
> 
> By the way, normally device didn't configure backlight to highest on
> bootloader.
> This is for power management.
> If we set backlight to highest on bootloader then device may be forced to
> shutdown due to the state of battery too low even user already set backlight
> to lowest on user setting.
> 
> Note that the backlight setting is fixed on bootloader and not sync with
> user setting.
> So this should not be a bug.

Got it. Thanks for explanation. I'll work on a graceful solution in Gaia instead.

Comment 5

[Andrew Overholt [:overholt]]

Not a platform blocker.  Tim, if you can put a link to the Gaia issue here, we'd appreciate it.  Thanks.

Comment 6

[Tim Guan-tin Chien [:timdream] (please needinfo)]

Supposedly done in 

https://github.com/mozilla-b2g/gaia/pull/4352