When I open gnome-color-manager, select a profile, and hit "View Details", there are two tabs labeled "From sRGB" and "To sRGB". I'm not sure exactly what these are, but I assume that you want them to be the same. Mine are very different, with the "From sRGB" looking about right and the "To sRGB" looking very dull and wrong.
I have a monitor that has been calibrated with the i1 Display Pro and dispcalgui. Why are these images so wrong?
I also notice that if I load a picture into Gimp and select to use the system color profile under color management, that is looks dull and incorrect (like "From sRGB" above). If I turn off the color management in Gimp, it looks more correct (like "To sRGB"). I don't know if these are related, but I'm thinking that they probably are.