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Cyanogenmod 11 has a new settings for Automatic brightness.

Screenshot
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.

  • 1
    Man, this is still unanswered? Not knowing this is bugging me, I must do some research. – Ben Mar 13 '14 at 15:52
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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.
  • 1
    I love when features are only documented in the source code :( – endolith Oct 20 '14 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 Apr 24 '15 at 22:22

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