1. M17x R3 Windows 10 Drivers
2. Alienware M17x R3 No Sb Bus Controller Driver 2017

Thanks for the info.

I tried method 1 and it did not change anything.

I followed the link and followed all directions for updating drivers, uninstalling/reinstalling drivers, installing only generic Microsoft drivers, etc. I tried everything.

Get drivers and downloads for your Dell Alienware M17x R3. Download and install the latest drivers, firmware and software. The USB FAT32 flash drive default upgrade is faster and smoother, update System Bios to unlocked A12 (Sata III fix) http://forum.techinferno.com/alienware-m17x/2279.

I read over method 2 and tried to disable the speakers, just to see what it would do. There was no sound, of course. I checked the list and it doesn't look like the device manager recognizes the jack at all. There is a 'Speakers' option and several 'Digital Display Audio' options that are greyed out because I do not have any outputs going anywhere. I tried to find the headphone and headphone/mic jacks on the list, but they aren't there. I checked the jacks and there is nothing physically wrong with them, the laptop just has no idea that there are jacks available. When I plug in the headphones, the sound comes from the speakers AND the headphones.

I guess my next step is figuring out why the laptop suddenly doesn't recognize that there are jacks available.

M17x R3 Windows 10 Drivers

Thank you so much for your quick response and I hope you can help me again.

Alienware M17x R3 No Sb Bus Controller Driver 2017