I created a folder "Documents" in the Documents and Media Library, then I uploaded a PDF file to the "Documents" folder.
I added a Documents Library Display portlet to my page. When connected as administrator I can navigate into the folder and see the document. This document should be available to everybody (including Guest).
I set the permissions on the portlet (actually they are already OK since Guest has View permissions).
I set permissions on the "Documents" folder (Guest already has View but I even added "Access").
I set permissions on the pdf document.
Nevertheless, when I sign-out I see an error message in the DL Display portlet saying:
You do not have the required permissions.
I had already reported this problem (
LPS-18874). I tried the workaround identified by Raymond but it doesn't seem to work.
I removed the View permissions for Guest both on the portlet and on the "Documents" folder in the DL, then added them back but it doesn't help, Guest can't see the folder.