A system update and reboot seems to have fixed the issue for me. There is another issue with ALC892 that causes a "headphones" output to flash in sound settings. The workaround is to actually connect headphones to the subwoofer jack and the "headphone" output will disappear. The fact that I had headphones connected to the subwoofer jack when I rebooted might also be the reason it worked.
http://ubuntuforums.org/showthread.php?t=2132324 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311939 Title: alsa-driver no HDMI audio on Ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1311939/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
