How does the new "Brightness adjustment" setting work on CM11?

Question

Cyanogenmod 11 has a new settings for Automatic brightness.

^{Screenshot (click to enlarge)}

I am curious how exactly "Brightness adjustment" and "Adjustment sensitivity" work.

I tried to find the answer on Google and CM Wiki without success.

Man, this is still unanswered? Not knowing this is bugging me, I must do some research. — Ben, Commented Mar 13, 2014 at 15:52

Fenikso · Accepted Answer · 2014-03-23 10:22:37Z

2

So I went digging in the Cyanogen source code. It appears that settings work as follows:

The brightness is determined from ambient light sensor based on spline (can be changed in "Adjust").
Brightness adjustment - Makes overall auto-brightness result darker or lighter by affecting gamma value. Centering the slider means "no change".
Adjust to sunrise and sunset - Also affects gamma value, but based on time of day and time of sunrise and sunset.
Adjustment sensitivity - There is a delay in screen brightness changes due to ambient light changes. This settings affects the delay to make it faster / slower.

answered Mar 23, 2014 at 10:22

Fenikso

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I love when features are only documented in the source code :(
– endolith
Commented Oct 20, 2014 at 3:08
I have really strange issue : setting brightness adjustment to 0 lux preview as it should but then when validating change the luminosity change brigher.
– Hugo Gresse
Commented Apr 24, 2015 at 22:22

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