I've also found that whenever i change the hdmi resolution back to one of the resolutions that the tv originally reported, the audio over hdmi begins to work again. if i again change to the the tv native resolution (set with xrandr), the audio over hdmi stops again.
while the audio is not working, in the 'PulseAudio volume control' the output bars are still moving as thought sound is actually playing. full troubleshooting to date is listed here: https://ubuntuforums.org/showthread.php?t=2367418 ** This bug is no longer a duplicate of bug 1533343 No sound from internal speakers after boot with connected headphones -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1606078 Title: No sound with Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1606078/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
