@MichaIng could you have a look pls.
Interesting, sounds similar to what @StephanStS observed on the VisionFive 2. Probably an issue with X11 in combination with the hardware if the plain console colours remain correct.
How did you exactly set it via xrandr
? I guess there is an xorg.conf setting we can try.
Also we should try to replicate it on NanoPi R5S (these we have).
when the display tint changes, the following command got it back to normal
xrandr --output HDMI-1 --set "color_format" "rgb"
this just happens to be the first thing i tried that made a difference, so likely there’s a better way
(i’ve also seen the colors look as they should after powerup when “color_format” is listed as “ycbcr444”)
also, is HDMI out a relatively new thing for NanoPi devices? looks like everything on the R5C is software/CPU driven at this point, no graphics hardware acceleration … in addition to the item reported above, I’m able to help with other testing on the R5C
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