Behringer UMC22 lost capture support

[Ohad Lutzky]

Ubuntu release: 21.10
alsa-base version: 1.0.25+dfsg-0ubuntu7
Kernel version: 5.13.0-27-generic #29-Ubuntu SMP Wed Jan 12 17:36:47 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

I have a Behringer U-Phoria UMC22 USB audio device, which in previous versions of Ubuntu correctly supports both output and capture. Upon upgrading to 21.10, it has lost capture support. The hardware itself still captures correctly, verified on a ChromeOS device.

The result of running alsa-info is here: http://alsa-project.org/db/?f=29a30af604267a2dc591610d06fce3175b379b86

The relevant device is "USB Audio CODEC" (this is how it was identified in previous versions of Ubuntu as well, as well as ChromeOS). Indeed, under "Mixer controls for card CODEC", there is no capture channel.

Indeed, Settings->Sound doesn't show this device as an input option. It works fine as an output option. I would expect this to show up as an input option, as it did with previous versions of ubuntu.

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.13.0-27.29-generic 5.13.19
Uname: Linux 5.13.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: ohad 2558 F.... pulseaudio
 /dev/snd/controlC3: ohad 2558 F.... pulseaudio
 /dev/snd/controlC0: ohad 2558 F.... pulseaudio
 /dev/snd/pcmC0D0p: ohad 2558 F...m pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Jan 30 21:20:43 2022
InstallationDate: Installed on 2019-06-25 (950 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
SourcePackage: alsa-driver
UpgradeStatus: Upgraded to impish on 2022-01-25 (4 days ago)
dmi.bios.date: 10/09/2020
dmi.bios.release: 1.29
dmi.bios.vendor: LENOVO
dmi.bios.version: R0YET46W (1.29 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20N8000RUK
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.22
dmi.modalias: dmi:bvnLENOVO:bvrR0YET46W(1.29):bd10/09/2020:br1.29:efr1.22:svnLENOVO:pn20N8000RUK:pvrThinkPadE490:rvnLENOVO:rn20N8000RUK:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20N8_BU_SMB_FM_ThinkPadE490:
dmi.product.family: ThinkPad E490
dmi.product.name: 20N8000RUK
dmi.product.sku: LENOVO_MT_20N8_BU_SMB_FM_ThinkPad E490
dmi.product.version: ThinkPad E490
dmi.sys.vendor: LENOVO

[Ohad Lutzky (lutzky)]

Workaround: Comment out the following line:

ATTRS{idVendor}=="08bb", ATTRS{idProduct}=="2902", ENV{ACP_PROFILE_SET}="behringer-umc22.conf"

...wherever it appears in /lib/udev/rules.d. For me this is in 90-{pipewire-alsa,pulseaudio}.rules.

I don't understand why this workaround helps. I found it here: https://www.reddit.com/r/linuxaudio/comments/qerbqa/suddenly_cant_select_input_of_behringer_umc22/