That has pretty much nothing to do with the color profile, when colors look very desaturated on HDR screens, that’s the driver messing up the colorspace signaling.
What GPU do you have? Both Intel and NVidia still have major problems with this.
Many displays (but not all, which is why it’s not exposed in the GUI) also support doing HDR without additional colorspace signaling, you could try enabling only hdr and disabling wcg with kscreen-doctor
. IMO the color part is the more noticeable benefit of HDR, but you could at least have functional HDR until your GPU driver is fixed.
It maps the colors to be more correct, and it does use the brightness info from the EDID for HDR content, so that checks out.
It might enable some sort of gamut mapping on the display side… HDR on monitors is really weird sometimes.
I think that’s a bug in amdgpu. It should force a modeset on hdr change, but it doesn’t.