I know this is a spread out problem out there. 3 days ago i installed el os (loki) on my computer and i noticed that after suspension, when i had a wake up the screen remained black. no pointer, anything, moreover the screen power button shows me a red light (like there's no signal). I've looked for out there and some of the solutions i found don't work (typing password, ctrl alt f1, f7 or something like that). Any advice?