Laptop display brightness adjustment keys

Robert Moskowitz rgm at
Wed Jun 28 17:04:38 CEST 2023

It is probably in steps of 1/15 scale and rounded off.  Same as my 
Samsung phone's brightness and volume.

On 6/28/23 10:24, Matt Connell wrote:
> Software: XFCE ver 4.18
> Hardware: Lenovo T420i
> How can I change by how much the brightness adjustment keys change the
> percentage?  The keys work, I can brighten and dim the display as
> desired, all the way from 0% to 100%, but the value by which it
> increments is... strange.  Someimtes each adjustment will change the
> brightness by 6%, sometimes 7%, without any rhyme or reason I can
> discern.
> Contrast this behavior to the volume keys that increment by a nice even
> 5% every time.
> How can I adjust this value for the brightness keys?
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