Issues with USB DAC

windsorHaze · June 9, 2020, 1:12am

Relative Linux newb here. Been trying to figure this problem out. Not really finding anything that has been able to help me resolve this issue.

The problem: I have a USB DAC that is not being recognized when booting up the OS. After boot up, I have to unplug the DAC and plug it back in and everything works perfectly fine. I also have an other issue, that after a certain period of time <30 minutes, if audio has been idle then the DAC is becoming uninstalled? I have to unplug and re-plug it in to get it working again.

This is various diag outputs before I unplug and re-plug the DAC.

[odin@valhalla ~]$ uname -r
5.6.15-arch1-1
[odin@valhalla ~]$ aplay -L | grep :CARD
default:CARD=PCH
sysdefault:CARD=PCH
front:CARD=PCH,DEV=0
surround21:CARD=PCH,DEV=0
surround40:CARD=PCH,DEV=0
surround41:CARD=PCH,DEV=0
surround50:CARD=PCH,DEV=0
surround51:CARD=PCH,DEV=0
surround71:CARD=PCH,DEV=0
usbstream:CARD=PCH
hdmi:CARD=NVidia,DEV=0
hdmi:CARD=NVidia,DEV=1
hdmi:CARD=NVidia,DEV=2
hdmi:CARD=NVidia,DEV=3
hdmi:CARD=NVidia,DEV=4
hdmi:CARD=NVidia,DEV=5
hdmi:CARD=NVidia,DEV=6
usbstream:CARD=NVidia
default:CARD=v2
sysdefault:CARD=v2
front:CARD=v2,DEV=0
surround21:CARD=v2,DEV=0
surround40:CARD=v2,DEV=0
surround41:CARD=v2,DEV=0
surround50:CARD=v2,DEV=0
surround51:CARD=v2,DEV=0
surround71:CARD=v2,DEV=0
iec958:CARD=v2,DEV=0
usbstream:CARD=v2
[odin@valhalla ~]$ cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7210000 irq 31
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xf7080000 irq 17
 3 [v2             ]: USB-Audio - RODE Podcaster v2
                      RODE Podcaster v2 at usb-0000:00:14.0-10, full speed

[odin@valhalla ~]$ lsmod | grep snd
snd_usb_audio         299008  4
snd_usbmidi_lib        40960  1 snd_usb_audio
snd_rawmidi            45056  1 snd_usbmidi_lib
snd_seq_device         16384  1 snd_rawmidi
mc                     61440  5 videodev,snd_usb_audio,videobuf2_v4l2,uvcvideo,videobuf2_common
snd_hda_codec_realtek   135168  1
snd_hda_codec_generic    98304  1 snd_hda_codec_realtek
ledtrig_audio          16384  2 snd_hda_codec_generic,snd_hda_codec_realtek
snd_hda_codec_hdmi     73728  1
snd_hda_intel          57344  5
snd_intel_dspcfg       28672  1 snd_hda_intel
snd_hda_codec         167936  4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core          106496  5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hwdep              16384  2 snd_usb_audio,snd_hda_codec
snd_pcm               147456  8 snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core
snd_timer              45056  1 snd_pcm
snd                   114688  27 snd_hda_codec_generic,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audio,snd_usbmidi_lib,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi
soundcore              16384  1 snd

And this is what those same commands look like after unplug/re-plug of the DAC

[odin@valhalla ~]$ cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7210000 irq 31
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xf7080000 irq 17
 2 [SDAC           ]: USB-Audio - SDAC
                      Grace Design SDAC at usb-0000:00:14.0-9, full speed
 3 [v2             ]: USB-Audio - RODE Podcaster v2
                      RODE Podcaster v2 at usb-0000:00:14.0-10, full speed
[odin@valhalla ~]$ aplay -L | grep :CARD 
default:CARD=PCH
sysdefault:CARD=PCH
front:CARD=PCH,DEV=0
surround21:CARD=PCH,DEV=0
surround40:CARD=PCH,DEV=0
surround41:CARD=PCH,DEV=0
surround50:CARD=PCH,DEV=0
surround51:CARD=PCH,DEV=0
surround71:CARD=PCH,DEV=0
usbstream:CARD=PCH
hdmi:CARD=NVidia,DEV=0
hdmi:CARD=NVidia,DEV=1
hdmi:CARD=NVidia,DEV=2
hdmi:CARD=NVidia,DEV=3
hdmi:CARD=NVidia,DEV=4
hdmi:CARD=NVidia,DEV=5
hdmi:CARD=NVidia,DEV=6
usbstream:CARD=NVidia
default:CARD=SDAC
sysdefault:CARD=SDAC
front:CARD=SDAC,DEV=0
surround21:CARD=SDAC,DEV=0
surround40:CARD=SDAC,DEV=0
surround41:CARD=SDAC,DEV=0
surround50:CARD=SDAC,DEV=0
surround51:CARD=SDAC,DEV=0
surround71:CARD=SDAC,DEV=0
iec958:CARD=SDAC,DEV=0
usbstream:CARD=SDAC
default:CARD=v2
sysdefault:CARD=v2
front:CARD=v2,DEV=0
surround21:CARD=v2,DEV=0
surround40:CARD=v2,DEV=0
surround41:CARD=v2,DEV=0
surround50:CARD=v2,DEV=0
surround51:CARD=v2,DEV=0
surround71:CARD=v2,DEV=0
iec958:CARD=v2,DEV=0
usbstream:CARD=v2

Looking forward to getting some help resolving this. Trying to complete my transition from using windows for the majority of my work.

ricklinux · June 9, 2020, 1:28am

Hello @windsorHaze
I think this will assist with the solution.

https://bbs.archlinux.org/viewtopic.php?id=223223

windsorHaze · June 9, 2020, 3:23am

I tried giving that solution a go. Did not resolve the issue. I also tried turning USB autosuspend off. That also did not work.

The usb dac works perfectly after I unplug it and plug it back in after booting up. For some reason it’s not being detected & enabled during boot. But once I plug it back in, its instantly recognized by the system as my default output audio device and works as intended.

Side note, my other USB devices work as intended post boot. My microphone, mouse, keyboard(albeit numlock is turned off).

EDIT: Also wanted to note. I’m running a custom kernel as well (uname -r = 5.7.1-nitrous+). I experience this problem on the custom kernel & the mainline kernel. I’ve been using endeavourOS for about 3 months now, with this persistent problem.