I am facing the same issue in Ubuntu 14.04 of audio not working over HDMI on Dell L502x with nVidia GT525M (Optimus), and the workaround suggested by (bcmpinc) above resolves the problem (although the workaround needs to be applied after each reboot).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1377653 Title: HDMI sound output not detected / NVIDIA optimus laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1377653/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
