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 Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1377653 Title: HDMI sound output not detected / NVIDIA optimus laptop Status in alsa-driver package in Ubuntu: Confirmed Status in pulseaudio package in Ubuntu: Confirmed Bug description: Hi, not sure if this is an alsa or nvidia/nouveau bug. HDMI audio output doesn't appear in sound settings output panel. Audio works well on internal speakers, but it seems there is no way to make it output to hdmi... The laptop has optimus NVIDIA+Intel. The behaviour is the same with nouveau or nvidia proprietary driver. Please let me know if further testing is required ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6 Uname: Linux 3.13.0-36-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sam 2295 F.... pulseaudio CurrentDesktop: Unity CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied Date: Sun Oct 5 17:05:35 2014 InstallationDate: Installed on 2014-04-21 (166 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Title: PCI/internal sound card not detected UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/02/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N56VZ.215 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N56VZ dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN56VZ.215:bd11/02/2012:svnASUSTeKCOMPUTERINC.:pnN56VZ:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN56VZ:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N56VZ dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1377653/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
