Audio works fine in Fedora 25-1.3 livecd and codec is detected as "ALC3234 Analog", alsa version k4.8.6-300.fc25.x86_64. It also works in F30.

On Qubes 4.0.2-rc2, I can't get audio to work at all. Codec shows up as "Generic Analog" in `aplay -l`, in alsamixer chip (codec) is "Generic ffff Generic", and kernel logs show

snd_hda_intel 0000:03:00.1: no codecs initialized
snd_hda_intel 0000:03:00.6: azx_get_response timeout, switching to polling mode: last cmd=0x000f0000 snd_hda_intel 0000:03:00.6: No response from codec, disabling MSI: last cmd=0x000f0000
snd_hda_intel 0000:03:00.6: Codec #0 probe error; disabling it...
snd_hda_intel 0000:03:00.6: No response from codec, resetting bus: last cmd=0x000f0000

... followed by a stack trace.

0000:03:00.6 is the speaker/headphone interface, and .1 is HDMI. I'm not concerned with HDMI at the moment.

I get a variety of different errors from aplay in dom0, or it just hangs indefinitely; it seems random. And I obviously can't hear anything playing in VMs.

ALSA version is k4.19.81-1.pvops.qubes.x86_64

I tried playing around with some modprobe options, such as probe_mask=1, probe_mask=8, model=auto, and index=1, but none of them get rid of the errors or cause the codec to be detected as anything other than "Generic Analog".

I get the same result when booting Qubes with VT-x and VT-d disabled. I also tried booting the Qubes installer, but it appears the installer doesn't attempt to load any sound drivers (no success or failure messages) and it doesn't appear to have alsa-utils.

Any idea why audio would work in Fedora 25 with 4.8.6, but not Qubes R4.0.2 with 4.18.81?

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