I create a 3D project in Unity3D 2019.2.9f.1 and add Terrain to the scene. When I try to edit it, nothing happens. In the same version of Unity on WIndows 10, everything works fine. Ubuntu 19.04 latest update. https://video.tedomum.net/videos/watch/56816791-ce64-45af-b04b-6ee35d86876f
It seems that this is a purely hardware problem. Everything works on my home computer. Tomorrow'll drop off information about computer.