I have trouble understanding whether I have some bad configuration or misunderstanding with monitor profiles under Linux.
Here’s my setup: I am calibrating and profiling my laptop monitor with DisplayGUI and a Spyder2 for some years now under Arch Linux. The profiles are installed in the OS and loaded into the video card gamma table. It works out of the box, but when selecting the monitor profile in RawTherapee or digiKam additionally, the colours look over saturated like if the colour correction is applied twice. Without any monitor profile or a generic profile like RTv4_sRGB in RT the colours look natural.
In contrast, if I reset the vcgt and use the monitor profile then, the colours also look unnatural. What do I need to do to see the “real” colours in RT or digikam with my monitor profile selected. Is my feeling correct, that the colour correction is applied “twice”? Is this a misunderstanding of the colour management as such or something I may reconfigure?