I recently came across a weird yet interesting problem with my laptop (XPS 15 9530). The speakers seem not to work properly. They work on and off, but not exactly randomly. For example, they I can always hear the operating system opening sound (I am using Linux mint 17.2) but systematically after that the laptop speakers stop working. I can use USB speakers or headphones. Interestingly enough, the laptop speakers sometimes start to work again after I stop using USB speakers.
I have also tried in windows, and they seem not to be working at all.
Any help would be very appreciated. I love my laptop, I want it to work!