Drag-and-drop is not working under various contexts in 16.04 LTS on my machine. When I start dragging a file, "hand" icon appears, but then when I hover over another window,and release, nothing happens. I am pretty sure the focus does not change to the new window. I tried starting to drag a file, and then hitting alt-tab until the focus is in the Nautilus window I want to drop into, but that did not work either.
Apparently this issue was fixed before in V 11, 12, 13.10, however it had been working previously when I used 14.04 LTS- 16.04 LTS. I reinstalled 16.04LTS after a hard drive issue, same hardware, and now it seems drag-and-drop isn't working. I am using Gnome, not Unity, which apparently had a bug that caused this issue. Not running VMWARE, which also had a bug that caused this issue.
I've verified I cannot drag and drop between Nautilus windows, Nautilus to Gmail attachment, and Nautilus image file to Libreoffice.
This post seems to indicate some settings in Dconf-editor that could fix the issue in earlier releases, however I cannot find those settings (open-folder-on-dnd-hover) in my dconf-editor.
Not sure what might affect this. I am running with two graphics cards, but the issue seemed to be there when I only had one card. I can post deets of the cards if anyone thinks it is relevant.