At random, if I'm using ANY 3D program or game (except, strangely, window managers, including compiz, gala, mutter, etc)... the GPU will lockup, the screen redraws with a bunch of lines at the bottom, and then it begins to turn white. I wish I could give more information but each time it happens the system locks up completely and I have to force it to restart (which is NOT good). This problem was happening on Ubuntu 12.10 and persists into 13.04.
At random, if I'm using ANY 3D program or game (except, strangely, window managers, including compiz, gala, mutter, etc)... the GPU will lockup, the screen redraws with a bunch of lines at the bottom, and then it begins to turn white. I wish I could give more information but each time it happens the system locks up completely and I have to force it to restart (which is NOT good). This problem was happening on Ubuntu 12.10 and persists into 13.04.