SPDIF is the optical output. It's often the same physical jack as your headphone. If any of you know someone with a digital receiver, that's what you need to test with. If you can connect the digital receiver to your headphone jack and have it work through the receiver, then it passes the test.
And yes, you do have SPDIF. It's listed in your alsa-info.sh outputs. Went over this a few comments ago. -- Realtek ALC883 speakers don't mute when headphones plugged in https://bugs.launchpad.net/bugs/253422 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs