NUC8i7HVK digital audio out in linux

[nathan-b]

Though the system has a rear digital audio port, I can't seem to get it detected in Linux. The port seems to be working -- when I unplug the cable, I can see it emitting red light. But it doesn't show up as a hardware option. The analog port seems to be working fine.

[root@nathanb-nuc ~]# dmesg | grep snd
[ 2.816102] snd_hda_intel: unknown parameter 'power-saving' ignored
[ 2.816171] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
[ 2.816386] snd_hda_intel 0000:01:00.1: enabling device (0000 -> 0002)
[ 2.816448] snd_hda_intel 0000:01:00.1: Force to non-snoop mode
[ 3.160317] snd_hda_intel 0000:01:00.1: bound 0000:01:00.0 (ops amdgpu_dm_audio_component_bind_ops [amdgpu])
[ 3.356309] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

 [root@nathanb-nuc ~]# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC700 Analog [ALC700 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 11: HDMI 5 [HDMI 5]
Subdevices: 1/1
Subdevice #0: subdevice #0

 [root@nathanb-nuc ~]# lsmod | grep hda
snd_hda_codec_realtek 159744 1
snd_hda_codec_generic 98304 1 snd_hda_codec_realtek
ledtrig_audio 16384 1 snd_hda_codec_generic
snd_hda_codec_hdmi 73728 2
snd_hda_intel 57344 5
snd_intel_dspcfg 28672 1 snd_hda_intel
snd_hda_codec 176128 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core 110592 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hwdep 16384 1 snd_hda_codec
snd_pcm 155648 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
snd 114688 18 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pc

I have tried using alsamixer and pavucontrol to make sure I'm not missing anything, with no luck. It seems like the HDA Intel module might not be detecting the hardware correctly?

[David_G_Intel]

Hello nathan-b

Thank you for posting on the Intel️® communities. Please share with us the following information:

• Did this connection work before?
• Which devices did you try?
• Did you try using Windows at any point before?
• Are the BIOS and drivers up to date?

Regards, 

David G 

Intel Customer Support Technician 

[nathan-b]

Hi @David_G_Intel , thanks for your reply!

• This is my first time trying digital audio out with this system, so as far as I can tell it has never worked.
• I only have one device I tried, which is a Sony audio receiver. This device worked with my previous NUC (a Skull Canyon model) using digital out, so I know that digital out works with this device in general. The cable any everything else is the same, only the NUC system is different.
• I did not try with Windows. I don't have a Windows license or any computers with Windows installed.
• I just updated the BIOS to the latest version from the Intel website. The kernel is up-to-date (5.14.15) and should have the latest snd_hda_intel driver.

[David_G_Intel]

Thank you for the information. We are still working on this request, the updates will be posted on the thread. Make sure to share the model or part number of the Sony receiver.

Regards, 

David G 

Intel Customer Support Technician 

[nathan-b]

Sony DA50ES. Please let me know if you need more information!

Thanks,

Nathan

[David_G_Intel]

Please share with us the Intel® System Support Utility for the Linux* Operating System results

• https://www.intel.com/content/www/us/en/download/18895/26735/intel-system-support-utility-for-the-linux-operating-system.html

Regards, 

David G 

Intel Customer Support Technician 

[nathan-b]

@David_G_Intel please see the attached file.

[David_G_Intel]

Thank you for the information. We will continue working on this request, the updates will be posted on the thread.

Regards, 

David G 

Intel Customer Support Technician 

[David_G_Intel]

After further investigation we confirmed that the OS you're using is not supported by the NUC. You will need to use one of the Supported Operating Systems for Intel® NUC Products

• https://www.intel.com/content/www/us/en/support/articles/000005628/intel-nuc.html

Regards, 

David G 

Intel Customer Support Technician 

[nathan-b]

What a disappointment. For shame.

[David_G_Intel]

You can contact your Linux distro support for more troubleshooting steps or alternatives. Please keep in mind that this thread will no longer be monitored by Intel. Thank you for your understanding.  

Best regards, 

David G 

Intel Customer Support Technician