In Ubuntu 16.04 on Intel i7-6700K and Intel HD 530 with Unity, Like Image Link, certain OpenGL/QT based programs show GUI with too large buttons, and certain areas are omitted. The programs with the problems are presumed to be mostly based on OpenGL and QT, like Schrodinger Maestro, PyMOL, and other scientific visualization and modelling programs. What can be the problem, and what should be done to resolve the problem?

Thank you in advance. (For anyone with enough reps, please embed the image and remove this text.)