I tried to install Elementary Freya and everything was good, though suddenly while using my laptop I get a black screen. I cannot use the mouse nor the keyboard. When I press the power button, to put the computer in sleep mode, and the open it again, I can see the desktop but cannot do anything.
I tried to use Mint 17.1 and then reinstalled Elementary again but I keep getting the same problem.
I use Linux next to windows 8.1
Thanks in advance, I would appreciate any help