I am also having this problem on a Dell Precision 5520 (which is similar hardware to both the Dell XPS 15 and Dell XPS 13).
Headphone output worked initially since install and then stopped working mid-session after unplugging and re-plugging the headphones. I was adjusting the "Alert volume" setting in sound settings at the time, which may or may not be relevant. Reebooting, unplugging and replugging, etc, nothing seems to bring it back. I am on Ubuntu 17.10 having installed fresh at the time of Beta 2, and the problem started occurring whilst I was fully updated today. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1721537 Title: No sound from headphone jack on xps13 9350 after ubuntu 17.10 dist- upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1721537/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
