Hi, I have upgraded to Linux Mint (20 Cinnamon) and installed RT 5.8. The issue is that when using automatically selected Profiled lens Correction, it does not recognize my camera Nikon D3400. It is not on the list at all (but most Nikon cameras are there, incl. D3300), It used to be fine on my previous Linux Mint and still it works on W10 (the same RT 5.8).
Did you use command lensfun-update-data? This will update the lensfun database…
Thank you very much. it really works.