Yesterday, I encountered the login loop error. I tried to look up what to do, but some of it just made the screen worse. Supposedly some of it was caused by having nvidia as your graphics card or something? Well, I gave up, and erased everything, and reinstalled as Ubuntu 16.10 yakkity yak. Besides being slower to start, the computer seems fine, except for one big problem. Once and a while, the graphics just give out and die? Like, if I click to open a menu of any kind, or even sometimes the internet itself, the screen becomes completely blurred with graphics where I can't see anything. When this happens, I try just pushing power and restarting, and it restarts, but it happens again always. In fact, I will be bookmarking this page as I will probably get froze again at any time. PLEASE somebody help, this is a nightmare.