Andreas, could you please elaborate a little?
I trashed my driver installation trying to set up amdgpu-pro and had to reinstall my OS files, and wish to avoid going through that pain again.
Did you use the AMD supplied script, or (as I think you imply) selectively install just some of the .deb packages?
Or did you not install .deb packages but merely extract the files you list in /opt/amdgpu-pro/lib64 fom the packages?
Your last line suggests having to call darktable from a terminal. Is it possible to set LD_LIBRARY_PATH in my envionment, or does it need to be set as a commandline option?