I'm having a strange problem on Ubuntu 17.10: when I try to drag and drop something inside Nautilus it simply doesn't work, it doesn't even select the item, it seems like it's ignoring the action…
Also, I cannot select things inside nautilus by drawing rectangles with the mouse.
All of these actions work only on the Desktop. Here is a demo:
I'm using the Xorg session with nVidia proprietary drivers.
I also noticed that Nautilus seems to hang when I try to copy, paste or cut a file…
EDIT 1: I solved the problem for the slow copy/paste by disabling the clipboard sync plugin of KDEConnect.
I also discovered that if I open Nautilus as root, I can drag and drop or select whatever I want…
Best Answer
As Matteo pointed out himself this happens if the Nautilus Flowbox View is enabled. To disable it open a terminal and execute the following:
Of course you can use the dconf-Editor as well and follow the path above to toggle the setting.