@Hui Wang, I ran Software Updater, but there was no 0616 in PPA. I downloaded the package from the link below, and installed it manually. oem-audio-hda-daily-dkms (0.201706180301~ubuntu16.04.1) https://launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/alsa-daily/+packages I can see HDMI/Display Port in [All Settings][Sound] after installing the package.
$ uname -r 4.4.0-80-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1694665 Title: [DP MST] No audio output through HDMI/DP/mDP ports in Dell WD15 and TB15 docking stations To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1694665/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
