I just installed Loki and after installation when I boot up all I have is a black screen and a mouse pointer. I can move the cursor around but the screen remains black. When I hold down the power button to reboot the system the eOs logo appears on the screen before shutdown. I tried reinstalling a second time leaving install 3rd party drivers and updates unchecked but I still have the same result unfortunately. I have a pretty old graphics card now an AMD HD 5770 and the open source display drivers are usually fine on Linux with this card.