Kai,
I also tried xgamma but that doesn't work. I suspect xgamma is
intended to change settings in the videocard (which is impossible in
my situation). Actually I also need brightness and contrast. Because
all these operate on the luminance of the image they are closely
related to each other. If gamma works then it is easy to hack
brightness and contrast into the same function.
Nico Coesel
At 17:49 20-4-2012, Kai-Uwe Behrmann wrote:
Am 20.04.12, 17:16 +0200 schrieb N. Coesel:
I have the following problem. I need to be able to adjust gamma,
brightness and contrast of a display which has no such controls
(its on a framebuffer device using RGB565 Truecolor). This means
the adjustment has to be done in software. Setting the gamma in the
config file also doesn't work and xrandr is also unable to set gamma values.
You are looking for kind of calibration, right? Did you try xgamma?
kind regards
--
Kai-Uwe Behrmann
www.oyranos.org
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