I have the same issue. None of the solutions described above works for me (suspend/resume, Vart van Deenen's solution, "sudo alsa force-reload" or anything else). The settings in control center/sound detects that the headphones are plugged in, but sound comes out of them.
Sound from speakers work fine, also headphones with USB DAC/amplifier works. Laptop Dell XPS 9550 Unbuntu Gnome 16.10 BIOS 1.2.19 uname -a Linux elefant 4.8.0-39-generic #42-Ubuntu SMP Mon Feb 20 11:47:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575078 Title: [XPS 15 9550, Realtek ALC3266] Headphone jack stops working after a while To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1575078/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
