Comment 134 for bug 1388612

Done, same result with FooBillard++ except that the graphical environment becomes unusable; you can only move the mouse cursor. If you switch to another virtual console and restart the lightdm service from there, you come back to the login screen and you don't have to reboot. I've tried OpenArena, Warzone 2100, two WebGL tests found on the web and all glmark2 tests again on Ubuntu 15.10; they all works fine. Seems to be a very specific problem. Can you suggest me an application that performs a comprehensive GPU test or something else that is interesting to try?