I have a very useful update on the Skylake/nvidia GTX1060 case where the HDMI Audio device does not show up in lspci. Based on information found on the NVidia Developer forum, I was able to get my HDMI audio device show up in Ubuntu 17.10 as per my posting there:
https://devtalk.nvidia.com/default/topic/1024022/linux/gtx-1060-no- audio-over-hdmi-only-hda-intel-detected-azalia/post/5216905/#5216905 Crossposting the information here so affected people can try this as well: Create the file "/etc/systemd/system/fix-hdmi-audio.service" as per below: [Unit] Description=nVidia HDMI Audio Fixer Before=systemd-logind.service display-manager.service After=module-init-tools.service [Service] Type=oneshot ExecStart=/root/fix-hdmi-audio.sh [Install] WantedBy=multi-user.target Create the file "/root/fix-hdmi-audio.sh" as per below (Note, adjust the PCI device paths to the PCI ID of the PCIe Bride and NVidia card): #!/bin/sh setpci -s 01:00.0 0x488.l=0x2000000:0x2000000 rmmod nvidia-uvm nvidia-drm nvidia-modeset nvidia sh -c 'echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove' sh -c 'echo 1 > /sys/bus/pci/devices/0000:00:01.0/rescan' modprobe nvidia nvidia-modeset nvidia-drm nvidia-uvm And then execute the following commands (as root) to make it do this at boot: chmod +x /root/fix-hdmi-audio.sh systemctl enable fix-hdmi-audio.service After each reboot, I now see the HDMI audio device on my laptop: fludizz@tongerlo:~$ lspci | grep "PCIe Controller\|NVIDIA" 00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 07) 01:00.0 VGA compatible controller: NVIDIA Corporation GP106M [GeForce GTX 1060 Mobile] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GP106 High Definition Audio Controller (rev a1) fludizz@tongerlo:~$ aplay -l | grep NVidia card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1] card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2] -- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
