Hello,
this used to work.
xcalib D6200MTX.icc
After this it stopped working
commit 20a34e78f0d71cab058a943b2e9601b97b761227
drm/i915: Update color management during vblank evasion.
Color profile only take effect after the screen if back on.
xcalib D6200MTX.icc
xrandr --output eDP1 --off
xrandr --output eDP1 --auto
thanks
Kui.Z