This is my first post here. I'm at the beginning of the road called Raspberry Pi.
Is there any way of changing the gamma/contrast/brightness of monitor via Raspberry Pi?
My Samsung 960BF doesn't have any hardware adjustment, only a power button.
I tried using xbacklight
and got error
"No outputs have backlight property".
gddccontrol
also didn't work. Error:
I/O warning: failed to load external entity "/home/pi/.dccontrol/monitorlist"
Document not parsed successfully
Probing for available monitors"
And nothing is happening.
I connected my monitor through DVI-HDMI cable. Maybe this is why it doesn't work?
I'm using Raspberry Pi B+ V1.2 with Raspbian.
Best Answer
One tool I have used successfully (not on a pi though), is
xcalib
from the package of the same name. You can use it to change the gamma, eg:You can repeat this. To cancel use
Another useful option is making the whole screen reverse-video:
It is intended to work with icc profiles, but I have only used the above commands.