Same result with 378.13-0ubuntu0~gpu17.04.3. The Nvidia audio stack is not listed with 'sudo lspci -H1'. A 'echo 1 > /sys/bus/pci/rescan' doesn't help either. It seems the audio-stack of the Nvidia-GPU isn't powered up.
HDMI audio works fine with Win10. -- 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
