powerdevil screen brightness linear vs nonlinear adjustment idea

[Kai Uwe Broulik]

Hi,

PowerDevil maintainer here. Unfortunately, I haven't had much time to 
look after PowerDevil, but I agree that a logarithmic scale for screen 
brightness makes sense.

Perhaps PowerDevil can even abstract that way from the user, so the UI 
in Battery Monitor for instance stays linear 0-100% but is then 
translated internally by PowerDevil.

> I might propose a change to the default 
> brightness control behavior. If it is not, I would ask for [sanction to 
> work on] configuration options that would allow users to change from 
> linear to nonlinear adjustment.

Patches welcome :)

 > I also think that the ideal number of steps is less than 20, possibly 
closer to 10, and I wonder how much of that original choice of 20 might 
have been influenced by the brightness of the lowest step (5% vs 10%). 
If the lowest step can be closer to 1%, that decision might deserve a 
second look.

There's no real reason, just so that one brightness up step results in a 
5% change just as one volume step up does. I typically use the mouse 
wheel on the battery icon, though, where you can freely adjust the 
brightness without any steps whatsoever. I think 5% is still a bit 
coarse currently but, as you said, might become less of an issue if we 
were to go logarithmic.

Cheers
Kai Uwe