The calibration would affect all colors on the monitor - not only the
windows within DT. And this is normal.
In your case the returned answer is "HDMI1 the X atom and colord
returned the same profile " - this is good.
Because I had negative experience in the past (laptop with attached
monitor) I restrict DT to use "colord" only.
The setting in DT is to apply monitor profile - you should be fine with
this. It simply says that whatever is selected as a system profile will
be used. In some cases however you may want to select specific profile.
Such case would be when colord and X atom do not match for example
(assuming the system is using one profile with x atom but the colord
profile is different - what you want to use). In your case however they
match so you should be ok.
And yes - the articles the other pointed to are very good - depending
how much you want to read about color management....
Regards,
B
On 2017-01-09 12:45 PM, Matthieu Moy wrote:
----- Original Message -----
Hi,
I calibrated my monitor(s) some time ago and was happy with this. But
recently I helped a friend of mine to calibrate - both on Linux and
Windows - and got some doubts on my understanding of this.
When I set up a monitor profile and activate it in gnome color manager
(> settings > color in my LinuxMint 17.3 Cinnamon desktop) I see all of
my desktop "change color", including the frames of the windows etc.
This led me to the assumption that color correction of the monitor works
globally - application independent.
On the other hand I find settings in e. g. darktable to apply a monitor
profile.
calibrating your monitor affects both the hardware (the global effect you are
seeing) and the software. You need both to get accurate colors.
The hardware (calibration per se) part consists in configuring the graphics
card's LUT to get a good approximation of colors. The second part is profiling
your screen and the result is used by color-managed software. If I understood
correctly, the profile tells the software both how to render each color and
which color cannot be rendered (used to know which pixel is out of gamut on
screen).
If you use dispcal (https://displaycal.net/), then both steps are explicitly
shown in the UI.
What's both nice and confusing is that both informations are stored in the same
file (.icc).
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