I have an Inspiron 7520. I got an AMD Radeon HD 7730m 2go with a Intel HD 4000 running on Open Source driver updated from X-edgers repository. I got also a I7 2.4ghz overclocking to 3.1ghz.
The problem I experience today is that when I leave my computer untouched, my screen goes black(as expected) but I can't wake him up. The screen remains black. The thing that tells me that the computer crashes is that my wireless card crashed. I have lost the connection between this computer and another one, transfering data from SSH