Comment 4 for bug 1574049

Thanks for the bug report, but this is most likely not a Dolphin issue (unless you get these previews in the file dialog of, e.g., KWrite, and in Folder View). Dolphin itself cannot create thumbnails for anything at all, it relies on external preview plugins for this. It seems that the necessary plugins are not installed on your system. It could be that the plugins were not ported to Qt5/KF5 yet, but I do not now where to find the source for the PDF plugin at the moment, so I cannot check that, but maybe someone else has an idea.