Redefine 100% hardware brightness level

[aaronadamsCA]

My built-in display is 500 nits, my external display is 300 nits. They look similar up to 50%, then the built-in gets brighter a LOT faster than the external.

xychart-beta
  x-axis Brightness [0, 25, 50, 75, 100]
  line [0, 25, 50, 75, 100]
  line [0, 25, 50, 62.5, 75]

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I think if I could down-map the external display's 100% hardware brightness level to ±75%, I could create a better "usable range" where the brightness of the two displays "feels" more even.

xychart-beta
  x-axis Brightness [0, 25, 50, 75, 100]
  line [0, 25, 50, 75, 100]
  line [0, 25, 50, 75, 75]

Loading

Delta syncing is too fiddly for this, and I've tried DDC value mapping skew but I can't find a "curve" that works well.

[waydabber]

Yes, I should add a feature like this, I plan to add a similar remapping ability because of syncing, it's in the development pipeline, but I don't have an ETA right now. Most displays will however clamp DDC brightness input so if you alter the software dimming switchover point a bit and also change the DDC max from 100 to let's say 125 (where 100-125 should produce a clamped max brightness for the display) you might end up having what you seek. Worth a try.

[aaronadamsCA]

Hey, that's a great idea! It seems to work well. The out-of-bounds brightness value confuses the Samsung OSD, but I don't see any other strange side effects so far. Thank you!