How do dim screen, even if artifically, below the minimum?
With xrandr
you can affect the gamma and brightness of a display by altering RGB values.
From man xrandr
:
--brightness
Multiply the gamma values on the crtc currently attached to the output to specified floating value. Useful for overly bright or overly dim outputs. However, this is a software only modification, if your hardware has support to actually change the brightness, you will probably prefer to use
xbacklight
.
I can use it like:
xrandr --output DVI-1 --brightness .7
There is also the xgamma
package, which does much of the same, but...
man xgamma
:Note that the
xgamma
utility is obsolete and deficient,xrandr
should be used with drivers that support the XRandr extension.
I can use it like:
xgamma -gamma .7