With today's update to 188.8.131.52 kernel in Ubuntu 16.04 LTS on my Dell XPS, both sound & wifi stopped working. The computer does not believe it has either sound or wifi. (This update was done via the normal, automated updater.)
I was able to boot back into the .42 kernel in grub, and that works as before, uname -a included, FYI:
Linux ELIDED-xps 4.4.0-42-generic #62-Ubuntu SMP Fri Oct 7 23:11:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
But the most recent update is basically nonfunctional without networking.
Is there a fix? Do I need to be in the .43 kernel to apply it, etc.?