Comment 18 for bug 1285444

As usual there has been 'progress' on my side. I lost my primary SSD and had to reinstall. The problem went away with that. I'm still convinced that the problem is with unity getting stuck, not the graphics driver.

Just try something: Create a subdirectory in your home directory and move everything (including all hidden files/directories) into it. Then log back in and it will work again. You can then move stuff back in place, only do it for know files/directories. You'll loose some gnome/uniti customization, but that's all.