For the sake of testing, I checked on the latest Impish daily image, with kernel 5.11.0-18-generic. Same problem. dmesg attached. Alsa and PulseAudio don't detect any sound card, even though in dmesg we can see:
$ sudo dmesg | grep -i snd
[ 26.169850] snd_hda_intel 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040100
[ 26.169858] snd_hda_intel 0000:00:1f.3: Digital mics found on Skylake+ platform, using SST driver
For the sake of testing, I checked on the latest Impish daily image, with kernel 5.11.0-18-generic. Same problem. dmesg attached. Alsa and PulseAudio don't detect any sound card, even though in dmesg we can see:
$ sudo dmesg | grep -i snd prog-if info 0x040100
[ 26.169850] snd_hda_intel 0000:00:1f.3: DSP detected with PCI class/subclass/
[ 26.169858] snd_hda_intel 0000:00:1f.3: Digital mics found on Skylake+ platform, using SST driver
$ aplay -l front-right description = "Monitor of Dummy Output" input-microphon e" front-right description = "Dummy Output"
aplay: device_list:276: no soundcards found...
ubuntu@ubuntu:~$ pactl list cards
ubuntu@ubuntu:~$ pactl list sources
Source #0
State: SUSPENDED
Name: auto_null.monitor
Description: Monitor of Dummy Output
Driver: module-null-sink.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,
Owner Module: 13
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor of Sink: auto_null
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY
Properties:
device.
device.class = "monitor"
device.icon_name = "audio-
Formats:
pcm
ubuntu@ubuntu:~$ pactl list sinks
Sink #0
State: SUSPENDED
Name: auto_null
Description: Dummy Output
Driver: module-null-sink.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,
Owner Module: 13
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: auto_null.monitor
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY SET_FORMATS
Properties:
device.
device.class = "abstract"
device.icon_name = "audio-card"
Formats:
pcm