Nvidia hdmi audio quit working in FreeBSD 14.1

[jrushford]

Greetings,

I was running FreeBSD 14.1-RELEASE and HDMI audio was working fine for me with two monitors, GeForce GT 730 with dual HDMI. I'm not sure when exactly it happened but after an update, the HDMI audio quit working. I decided to upgrade to 14.2-RELEASE and found that HDMI audio is still not working for me.

I've selected the correct PCM device:

pcm0: <NVIDIA (0x0051) (HDMI/DP 8ch)> at nid 4 on hdaa0
pcm1: <NVIDIA (0x0051) (HDMI/DP 8ch)> at nid 5 on hdaa0

hw.snd.default_unit: 0
hw.snd.default_auto: 0

I'm using the nvidia-driver-470-470.161.03_1 driver.

What's weird is that with the xfce pulse audio control, I can see the audio level bar moving when trying to play audio but nothing makes it out the monitor audio jack to the speaker. There is nothing wrong with my monitors as I use them with an HDMI kvm switch on an Ubuntu 24.04 desktop that has the same graphics card and all is fine there. Here is more info on my hardware:

vgapci0@pci0:2:0:0: class=0x030000 rev=0xa1 hdr=0x00 vendor=0x10de device=0x
1287 subvendor=0x10de subdevice=0x1083
vendor = 'NVIDIA Corporation'
device = 'GK208B [GeForce GT 730]'
class = display
subclass = VGA
hdac0@pci0:2:0:1: class=0x040300 rev=0xa1 hdr=0x00 vendor=0x10de device=0x
0e0f subvendor=0x10de subdevice=0x1083
vendor = 'NVIDIA Corporation'
device = 'GK208 HDMI/DP Audio Controller'
class = multimedia
subclass = HDA

cat /dev/sndstat
Installed devices:
pcm0: <NVIDIA (0x0051) (HDMI/DP 8ch)> (play) default
pcm1: <NVIDIA (0x0051) (HDMI/DP 8ch)> (play)
No devices installed from userspace.

relevent rc.conf settings:

kld_list="nvidia nvidia-modeset"
sound_load="YES"
snd_hda_load="YES"



Is anyone else having trouble with HDMI audio on 14.1 or 14.2? Any ideas as to what's going on?

 

[SirDice]

hw.snd.default_unit: 0

Have you tried setting this to the other unit? Or swap the outputs of the video card.

 

[jrushford]

Have you tried setting this to the other unit? Or swap the outputs of the video card.

Yes, I tried that. I' moved to the other unit and I see the same thing, audio levels are moving on pcm1 as well but no audio reaches the speaker.

 

[jrushford]

Have you tried setting this to the other unit? Or swap the outputs of the video card.

SirDice, I did not try swapping the HDMI outputs though. I tried that just now and I have audio. I guess maybe the one HDMI cable was causing my issue. Thanks again for the suggestion but I now have audio again!