On Thu, Oct 15, 2015 at 01:17:15PM +0200, Simon Wolk wrote:

The Kernel changed from 3.2.0 to 3.19.0 for me. By installing the 3.19. the sound stopped working.

Yes, Ubuntu kernels change like that, but you can easily run more recent kernel versions, see Ubuntu Wiki page:

https://wiki.ubuntu.com/Kernel/MainlineBuilds

While you wait for help, you can install latest v4.2.3 built 3rd October 2015.

You can also test kernels between 3.2 and 3.19, if you don't get any other help.