My Steam installation has suddenly stopped working. I am on Ubuntu 14.04. I installed Steam a few months back, have played and downloaded several games, and everything has always worked fine. I played Portal and all of my video card settings worked, etc. I'm a casual gamer, so I usually only o...

When I try to open some apps like Gnome-tweak-tools or noise the windows is not correctly displayed. I'm running on Ubuntu 14.10 with a nVidia geforce9600GT-M and proprietary drivers (but also with the opensource the problem persist). Someone have an idea ?