I recently bought an Alienware 17x with switchable graphics (Intel 4600 and AMD Radeon HD R9 M290x). It's been working like a charm until today, when it was suddenly unable to detect my AMD card. I've tried installing the newest drivers from both AMD and Dell - neither have worked. Many seem to have had similar problems when updating Windows 8.1, but I haven't updated Windows recently so I don't think that can be the cause.
EDIT: Solved not five minutes after posting this by updating the BIOS from the Dell driver and download site.
Great thanks’ for letting us know, if you face any other issue please come back to us.
Alienware-Milena Dell | Alienware Technical Support #IWork4Dell Opening your case does not void your warranty! Check out Alienware Artificial Intelligence I can't always reply to PM's, if you need extra assistance visit: