Thx @krassowski , Yes, I saw that in the doc, so I tried webpdf. But I also tried asciidoc and html … all the same issue.
Now, nbconvert converts a saved notebook correctly. If I execute the notebook in the browser, save it, and then use nbcovert without the --execute.
So I suppose an alternative is to write a small program to do that using chrome --headless and remote control it with DevTools Protocol – there are some nice libraries to do that, I hope I can get jupyter notebook to execute all cells and save.
Any thoughts ?