alsa-project/alsa-lib issue #426 was opened from haoyi-codes:
I have initially thought it was a bug that was related to chromium as stated in #425. However, now I realize it has to be something else that is wrong.
`aplay -D default /dev/zero`
```
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.2.13/work/alsa-lib-1.2.13/src/pcm/pcm_dmix.c:1000:(snd_pcm_dmix_open) unable to open slave
aplay: main:850: audio open error: No such file or directory
```
`aplay -D plughw:0 /dev/zero`
```
aplay: main:850: audio open error: No such file or directory
```
`aplay -l`
```
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: Generic Digital [Generic Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: Generic Digital [Generic Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Audio [SA9123 USB Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
```
`cat /proc/asound/cards`
```
0 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0x81080000 irq 17
1 [HDMI ]: HDA-Intel - HDA ATI HDMI
HDA ATI HDMI at 0x81220000 irq 165
2 [Audio ]: USB-Audio - SA9123 USB Audio
SYC SA9123 USB Audio at usb-0000:00:14.0-3.2, full speed
3 [Edition ]: USB-Audio - Logi 4K Stream Edition
Logi 4K Stream Edition at usb-0000:00:14.0-3.3, super speed
```
`ls -la /dev/snd/*`
```
crw-rw----+ 1 root audio 116, 0 Dec 4 23:18 /dev/snd/controlC0
crw-rw----+ 1 root audio 116, 32 Dec 4 23:18 /dev/snd/controlC1
crw-rw----+ 1 root audio 116, 64 Dec 4 23:18 /dev/snd/controlC2
crw-rw----+ 1 root audio 116, 96 Dec 4 23:18 /dev/snd/controlC3
crw-rw----+ 1 root audio 116, 19 Dec 4 23:18 /dev/snd/pcmC0D3p
crw-rw----+ 1 root audio 116, 51 Dec 4 23:18 /dev/snd/pcmC1D3p
crw-rw----+ 1 root audio 116, 80 Dec 4 23:18 /dev/snd/pcmC2D0p
crw-rw----+ 1 root audio 116, 120 Dec 4 23:18 /dev/snd/pcmC3D0c
crw-rw----+ 1 root audio 116, 1 Dec 4 23:18 /dev/snd/seq
crw-rw----+ 1 root audio 116, 33 Dec 4 23:18 /dev/snd/timer
/dev/snd/by-id:
total 0
drwxr-xr-x 2 root root 80 Dec 4 23:18 .
drwxr-xr-x 4 root root 280 Dec 4 23:17 ..
lrwxrwxrwx 1 root root 12 Dec 4 23:18 usb-046d_Logi_4K_Stream_Edition_51C07EAF-03 -> ../controlC3
lrwxrwxrwx 1 root root 12 Dec 4 23:18 usb-SYC_SA9123_USB_Audio-01 -> ../controlC2
/dev/snd/by-path:
total 0
drwxr-xr-x 2 root root 160 Dec 4 23:18 .
drwxr-xr-x 4 root root 280 Dec 4 23:17 ..
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:00:14.0-usb-0:3.2:1.1 -> ../controlC2
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:00:14.0-usb-0:3.3:1.3 -> ../controlC3
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:00:14.0-usbv2-0:3.2:1.1 -> ../controlC2
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:00:14.0-usbv3-0:3.3:1.3 -> ../controlC3
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:01:00.1 -> ../controlC0
lrwxrwxrwx 1 root root 12 Dec 4 23:18 pci-0000:05:00.1 -> ../controlC1
```
For reference I am still able to play audio on my system as pulseaudio is running but for applications that use alsa directly it does not work.
```
Server String: /run/user/1011/pulse/native
Library Protocol Version: 35
Server Protocol Version: 35
Is Local: yes
Client Index: 59
Tile Size: 65472
User Name: user
Host Name: system
Server Name: PulseAudio (on PipeWire 1.2.7)
Server Version: 15.0.0
Default Sample Specification: float32le 2ch 48000Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.usb-SYC_SA9123_USB_Audio-01.iec958-stereo
Default Source: alsa_output.usb-SYC_SA9123_USB_Audio-01.iec958-stereo.monitor
Cookie: XXXX:XXXX
```
Issue URL : https://github.com/alsa-project/alsa-lib/issues/426
Repository URL: https://github.com/alsa-project/alsa-lib
