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Ploppz

Member

Registered: 2013-09-14

Posts: 313

lsusb does not find my audio interface anymore

I have a Behringer UMC202HD connected by USB to my desktop. It has worked fine for a long time. But today suddenly it is not registered by linux. It does have power.

$ lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 0c45:7692 Microdia USB Keyboard
Bus 003 Device 003: ID 046d:08e5 Logitech, Inc. C920 PRO HD Webcam
Bus 003 Device 002: ID 17cc:1860 Native Instruments KOMPLETE KONTROL M32
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 1b1c:1c0a Corsair
Bus 001 Device 005: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 004: ID 0b05:1939 ASUSTek Computer, Inc. AURA LED Controller
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 002: ID feed:6060 Ortholinear Keyboards The Atomic Keyboard
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 10: HDMI 4 [HDMI 4]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 11: HDMI 5 [HDMI 5]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I am not sure what more information I can share or what more I can do to troubleshoot

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,944

Re: lsusb does not find my audio interface anymore

If it's not in lsusb it's a low level issue outside of any driver/actual device functionality. Check dmesg for errors on connecting the device, you can do

sudo dmesg -W

to just show new messages from time of invocation, so run that command then plug it in, post the output. Did "today suddenly" entail a low level (kernel) change (unlikely, minimally registering on the USB bus should work even after updates)?

uname -a
pacman -Q linux

for the situation here.

Last edited by V1del (2022-02-10 09:16:53)

Ploppz

Member

Registered: 2013-09-14

Posts: 313

Re: lsusb does not find my audio interface anymore

Thanks, actually unplugging and reconnecting the audio interface it got discovered this time.
I did boot several times today, all times I had the same issue.
It's possible that I recently did a system update, although I doubt it happened just before this issue.
I'll update this post if I keep running into the issue that it's not discovered on boot.

~  $ uname -a
Linux nadir 5.16.8-arch1-1 #1 SMP PREEMPT Tue, 08 Feb 2022 21:21:08 +0000 x86_64 GNU/Linux
~  $ sudo pacman -Q linux
linux 5.16.8.arch1-1

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,944

Re: lsusb does not find my audio interface anymore

if you still want to investigate beside not being able to reproduce,

sudo journalctl -kb-1

will have the kernel log from the previous boot, you are looking for errors around the usb connection/usb bus.