Hello, I am using Lyx since several years with different Linux distributions (Ubuntu, Debian Jessie 8.x etc.).
Currently I have installed Ubuntu 16.04 LTS - and am facing a very strange an annoying problem: I have difficulties to select longer or even shortes pieces of text with the keyboard or mouse. If I am trying to select some text, the selection captures only short passages and fails after some words or paragraphs, regardless of whether I am selecting with the mouse or with keyboard shortcuts. ALl other programmes (text editor, Libre Office etc.) are working correctly and I can select text withput any problems. I am facing this problem with at least 4 computers, all of them have installed Ubuntu 16.04 LTS and LyX 2.1.4. I am running another machine with Debian 8.x and have no problems at all. Of course I have tried different keyboards and mice, I have also reinstalled Lyx and TexLive and I have deleted my old Lyx configuration files. I would very much appreciate all hints and tips to solve this problem. Yours, Hermann Josef