[Bug 271574] PCM doesn't load audio device names from snd_uaudio

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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 22 May 2023 22:01:45 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271574

            Bug ID: 271574
           Summary: PCM doesn't load audio device names from snd_uaudio
           Product: Base System
           Version: 13.2-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: usb
          Assignee: usb@FreeBSD.org
          Reporter: codescribebiz@gmail.com

Created attachment 242337
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=242337&action=edit
This shows a list of my audio devices according to KDE's Plasma PA widget

In KDE's PulseAudio widget, I noticed my audio devices were named generically
as `1: USB Audio`, `2: USB Audio`, and so forth. According to `dmesg | grep
pcm`, my audio devices are all named generically and the name corresponds to
the same one I see from KDE. Strangely, `usbconfig` showed the correct audio
device name instead of a generic placeholder.

I believe the bug is somewhere between `pcm` and `snd_uaudio`. According to
`dmesg`, my audio devices are identified with their correct names by snd_uaudio
and then pcm assigns them a generic name. Please see the output below for more
information.

Output of `cat /dev/sndstat`:
```
Installed devices:
pcm0: <NVIDIA (0x009f) (HDMI/DP 8ch)> (play)
pcm1: <NVIDIA (0x009f) (HDMI/DP 8ch)> (play)
pcm2: <NVIDIA (0x009f) (HDMI/DP 8ch)> (play)
pcm3: <NVIDIA (0x009f) (HDMI/DP 8ch)> (play)
pcm4: <USB audio> (play/rec) default
pcm5: <USB audio> (play/rec)
pcm6: <USB audio> (play)
pcm7: <USB audio> (play/rec)
No devices installed from userspace.
```

Output of `sudo usbconfig | grep -E "Audio|Corsair"`:
```
ugen0.3: <Generic USB Audio> at usbus0, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON
(100mA)
ugen0.6: <SYC SA9123 USB Audio> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps)
pwr=ON (100mA)
ugen0.11: <Corsair CORSAIR VOID ELITE Wireless Gaming Dongle> at usbus0, cfg=0
md=HOST spd=FULL (12Mbps) pwr=ON (100mA)
```

Output of `dmesg | grep uaudio`:
```
uaudio0 on uhub0
uaudio0: <Realtek USB2.0 Audio> on usbus0
uaudio0: Play[0]: 192000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 96000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 48000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm4: <USB audio> on uaudio0
pcm5: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
uaudio1 on uhub0
uaudio1: <HIFI AUDIO> on usbus0
uaudio1: Play[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 88200 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: No recording.
uaudio1: No MIDI sequencer.
pcm6: <USB audio> on uaudio1
uaudio1: No HID volume keys found.
uaudio2 on uhub0
uaudio2: <CORSAIR VOID ELITE Wireless Gaming Dongle> on usbus0
uaudio2: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 32000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 24000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 44100 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 24000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 22050 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 11025 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 8000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: No MIDI sequencer.
pcm7: <USB audio> on uaudio2
uaudio2: HID volume keys found.
uaudio0 on uhub0
uaudio0: <Realtek USB2.0 Audio> on usbus0
uaudio0: Play[0]: 192000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 96000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 48000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm4: <USB audio> on uaudio0
pcm5: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
uaudio1 on uhub0
uaudio1: <HIFI AUDIO> on usbus0
uaudio1: Play[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 88200 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: No recording.
uaudio1: No MIDI sequencer.
pcm6: <USB audio> on uaudio1
uaudio1: No HID volume keys found.
uaudio2 on uhub0
uaudio2: <CORSAIR VOID ELITE Wireless Gaming Dongle> on usbus0
uaudio2: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 32000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 24000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 44100 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 24000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 22050 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 11025 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 8000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: No MIDI sequencer.
pcm7: <USB audio> on uaudio2
uaudio2: HID volume keys found.
uaudio0 on uhub0
uaudio0: <Realtek USB2.0 Audio> on usbus0
uaudio0: Play[0]: 192000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 96000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 48000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm4: <USB audio> on uaudio0
pcm5: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
uaudio1 on uhub0
uaudio1: <HIFI AUDIO> on usbus0
uaudio1: Play[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 88200 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: No recording.
uaudio1: No MIDI sequencer.
pcm6: <USB audio> on uaudio1
uaudio1: No HID volume keys found.
uaudio2 on uhub0
uaudio2: <CORSAIR VOID ELITE Wireless Gaming Dongle> on usbus0
uaudio2: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 32000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 24000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 44100 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 24000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 22050 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 11025 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 8000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: No MIDI sequencer.
pcm7: <USB audio> on uaudio2
uaudio2: HID volume keys found.
uaudio0 on uhub0
uaudio0: <Realtek USB2.0 Audio> on usbus0
uaudio0: Play[0]: 192000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 96000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 48000 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 8 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[1]: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 192000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[1]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm4: <USB audio> on uaudio0
pcm5: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
uaudio1 on uhub0
uaudio1: <HIFI AUDIO> on usbus0
uaudio1: Play[0]: 96000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 88200 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 48000 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 44100 Hz, 2 ch, 24-bit S-LE PCM format, 2x8ms buffer.
uaudio1: No recording.
uaudio1: No MIDI sequencer.
pcm6: <USB audio> on uaudio1
uaudio1: No HID volume keys found.
uaudio2 on uhub0
uaudio2: <CORSAIR VOID ELITE Wireless Gaming Dongle> on usbus0
uaudio2: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 32000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 24000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 44100 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 24000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 22050 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 11025 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: Record[0]: 8000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio2: No MIDI sequencer.
pcm7: <USB audio> on uaudio2
uaudio2: HID volume keys found.
```

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