Hi -

I've been trying to get audio working on KDE neon for the better part of a day now and am hoping there's a fix I'm missing. No audio devices are available; I have both onboard audio and HDMI audio output, the latter being what I normally use. I plugged in a USB mic and that did not appear, nor does the mic from my webcam (not sure if the webcam is related).

The only thing I've found that's relevant is that it appears that drivers are not loaded. I ran lspci and these are the relevant parts:

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00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 05)
        Subsystem: ASRock Incorporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [1849:3892]

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1)
        Subsystem: eVga.com. Corp. GM204 [GeForce GTX 970] [3842:3975]
        Kernel driver in use: nvidia
        Kernel modules: nvidiafb, nvidia_drm, nvidia
01:00.1 Audio device [0403]: NVIDIA Corporation GM204 High Definition Audio Controller [10de:0fbb] (rev a1)
        Subsystem: eVga.com. Corp. GM204 High Definition Audio Controller [3842:3975]


noting that I have loaded Nvidia's proprietary drivers. These are the latest drivers at time of writing.
lshw lists both devices as unclaimed. inxi returns:

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Audio:     Device-1: Intel 6 Series/C200 Series Family High Definition Audio driver: N/A
           Device-2: NVIDIA GM204 High Definition Audio driver: N/A

I am on neon 5.21 and kernel 5.8.0-55-generic. Also tried:

• Updating everything (of course)
• Reinstalling PulseAudio
• Disabling the PulseAudio Bluetooth modules (don't know how that could be related but it was mentioned elsewhere)
• Deleting the PulseAudio config files, including the default ones (those had to be re-added manually)
• Liberal use of pulseaudio -k, restarting the service, and restarting the PC
• fuser -v /dev/snd/* returns nothing, and that directory only contains seq and timer
• alsactl finds no sound cards

I found out about the driver issue later on and was otherwise trying anything. Not sure where to get drivers for this.
Any help would be incredibly appreciated. Thank you for looking.

EDIT: I solved the issue by installing linux-modules-extra-5.8.0-55-generic, which was absent for whatever reason. alsa-info had listed neither a driver version nor a library version so I also installed libasound2-dev.