Fairphone 6 Extra Dim seems limited to 50% – can others confirm?

Help Fairphone 6
,
1

Hi,

I’m using a Fairphone 6 with iodéOS and noticed that Android’s Extra Dim feature barely makes the screen darker. Even with the normal brightness at minimum and Extra Dim set to maximum, the display is still quite bright at night.

After some investigation, I found that the effective maximum Extra Dim strength on my FP6 is limited to 50%:

$ cmd overlay lookup android android:integer/config_reduceBrightColorsStrengthMax

50

And with Extra Dim enabled at maximum:

$ dumpsys color_display | sed -n '/Reduce bright colors:/,/Color mode:/p'

Reduce bright colors:
    Activated: true
    mStrength = 50
Color mode: 256

I also tried manually setting the value to 100:

$ settings put secure reduce_bright_colors_level 100

The setting itself becomes 100, but the actual service still reports:

mStrength = 50

The LineageOS device configuration for the FP6 contains:

<integer name="config_reduceBrightColorsStrengthMax">50</integer>

while AOSP normally uses 90.

I’m trying to figure out whether this 50 limit is specific to LineageOS-based ROMs, comes from Fairphone’s original configuration, or has some hardware-related reason.

Could anyone with a Fairphone 6 running stock Fairphone OS, LineageOS or /e/OS check what their device reports?

If you have ADB available, please run:

cmd overlay lookup android android:integer/config_reduceBrightColorsStrengthMax

And, with Extra Dim enabled and its intensity at maximum:

dumpsys color_display | sed -n '/Reduce bright colors:/,/Color mode:/p'

Please include which OS/version you’re using.
For reference, mine is:

  • Fairphone 6
  • iodéOS 7.7-20260720-FP6
  • Result: config_reduceBrightColorsStrengthMax = 50
  • Effective Extra Dim strength: mStrength = 50

I’m mainly interested in finding out whether stock Fairphone OS also uses the same 50% limit.

2 
FP6:/ $ getprop ro.vendor.build.id
FP6.QREL.16.95.0
FP6:/ $ cmd overlay lookup android android:integer/config_reduceBrightColorsStrengthMax
50
FP6:/ $ dumpsys color_display | sed -n '/Reduce bright colors:/,/Color mode:/p'
Reduce bright colors:
    Activated: true
    mStrength = 50
Color mode: 0
3

So it looks like the problem is also on stock ROM. Thank you. I will forward this problem to Fairphone team. Let’s hope they will fix it or at least tell us, why they set it to such a value.

4

Any news on this? I also think that it could be a bit darker. Would be interesting to see what they say.

5

Unfortunately they haven’t responded yet. I’ve just received an automated message that they will look into it. I guess we will have to wait a bit more. Could you please also try to check the config on your phone using commands I’ve used before? If more people report the issue, the better the chances.

6 
FP6:/ $ cmd overlay lookup android android:integer/config_reduceBrightColorsStrengthMax
50
FP6:/ $ getprop ro.vendor.build.id
FP6.QREL.16.100.0
FP6:/ $ dumpsys color_display | sed -n '/Reduce bright colors:/,/Color mode:/p'
Reduce bright colors:
    Activated: true
    mStrength = 50
Color mode: 256
FP6:/ $

There you go :slight_smile: Same results.