[SOLVED] AVL-MXE and Behringer UMC404HD - No input at all [Solved]

[pablogvieira]

I've been using AVL-MXE for a couple months with an Audient EVO 4 Audio Interface with no major issues.

I bought a Behringer UMC 404HD and for some reason all of its inputs seem muted. I can use it for playback with both PulseAudio and Jack but I get no input signal in any of the channels on any sound system.

I don't know exactly how to troubleshoot this issue, but I've tested the audio interface with many other distributions via live USB - Fedora 34, Manjaro 21, Linux Mint 20.1, Ubuntu Studio 21.04, and I got good audio input on all of them.

In my non-scientific tests, he only operating systems where I've had this issue were AVL-MXE and MX-21 beta 2.

Any help would be appreciated. Thank you so much in advance.

EDIT: I solved it by opening QASMixer and enabling the little circles under the faders. They were disabled for some reason.

[SwampRabbit]

@pablogvieira while you're waiting for some audio or other gurus to respond.

Please provide your Quick System Information.

Did you check AlsaMixer or PulseAudio Control to see if its muted there?

[pablogvieira]

Thank you for your reply.

This is my Quick System Information:

Code: Select all

Snapshot created on: 20210617_0214
System:    Host: <filter> Kernel: 5.9.1-rt20avl1 x86_64 bits: 64 compiler: N/A 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.9.1-rt20avl1 
           root=UUID=<filter> ro quiet threadirqs noresume 
           efi=runtime 
           Desktop: Openbox 3.6.1 info: xfce4-panel dm: SLiM 1.3.6 Distro: AVL-MXE 
           base: Debian GNU/Linux 10 (buster) 
Machine:   Type: Laptop System: SAMSUNG product: 340XAA/350XAA/550XAA v: P03REP serial: <filter> 
           Chassis: type: 10 serial: <filter> 
           Mobo: SAMSUNG model: NP350XAA-XF3BR v: SGL9362A08-C01-G006-S0001+10.0.16299 
           serial: <filter> UEFI: American Megatrends v: P03REP.034.181016.ZW date: 10/16/2018 
Battery:   ID-1: BAT1 charge: 37.6 Wh condition: 37.6/43.1 Wh (87%) volts: 12.7/11.4 
           model: SAMSUNG Electronics SR Real Battery type: Li-ion serial: <filter> status: Full 
           cycles: 162 
           Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard serial: <filter> 
           charge: 55% (should be ignored) rechargeable: yes status: Discharging 
CPU:       Topology: Quad Core model: Intel Core i7-8550U bits: 64 type: MT MCP arch: Kaby Lake 
           family: 6 model-id: 8E (142) stepping: A (10) microcode: EA L2 cache: 8192 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 31999 
           Speed: 3540 MHz min/max: 400/4000 MHz Core speeds (MHz): 1: 3963 2: 3984 3: 3714 
           4: 3993 5: 3973 6: 3829 7: 3833 8: 3994 
           Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
           Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
           Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
           Type: meltdown mitigation: PTI 
           Type: spec_store_bypass 
           mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, 
           STIBP: conditional, RSB filling 
           Type: srbds mitigation: Microcode 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: Intel UHD Graphics 620 vendor: Samsung Co driver: i915 v: kernel 
           bus ID: 00:02.0 chip ID: 8086:5917 
           Device-2: NVIDIA GM108M [GeForce MX110] vendor: Samsung Co driver: N/A 
           bus ID: 01:00.0 chip ID: 10de:174e 
           Display: x11 server: X.Org 1.20.10 driver: modesetting unloaded: fbdev,vesa 
           compositor: compton v: 0.1~beta2+20150922 resolution: 1920x1080~60Hz 
           OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.3.4 
           direct render: Yes 
Audio:     Device-1: Intel Sunrise Point-LP HD Audio vendor: Samsung Co driver: snd_hda_intel 
           v: kernel bus ID: 00:1f.3 chip ID: 8086:9d71 
           Device-2: MACROSILICON USB Video type: USB 
           driver: hid-generic,snd-usb-audio,usbhid,uvcvideo bus ID: 1-2:3 chip ID: 534d:2109 
           Device-3: BEHRINGER UMC404HD 192k type: USB driver: snd-usb-audio bus ID: 1-3:5 
           chip ID: 1397:0509 
           Sound Server: ALSA v: k5.9.1-rt20avl1 
Network:   Device-1: Realtek RTL810xE PCI Express Fast Ethernet vendor: Samsung Co driver: r8169 
           v: kernel port: d000 bus ID: 02:00.0 chip ID: 10ec:8136 
           IF: eth0 state: down mac: <filter> 
           Device-2: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter 
           vendor: Samsung Co driver: ath10k_pci v: kernel port: d000 bus ID: 03:00.0 
           chip ID: 168c:0042 
           IF: wlan0 state: up mac: <filter> 
           Device-3: Qualcomm Atheros type: USB driver: btusb bus ID: 1-5:7 chip ID: 0cf3:e500 
Drives:    Local Storage: total: 1.16 TiB used: 373.32 GiB (31.5%) 
           ID-1: /dev/sda vendor: Seagate model: ST1000LM035-1RK172 size: 931.51 GiB block size: 
           physical: 4096 B logical: 512 B speed: 6.0 Gb/s rotation: 5400 rpm serial: <filter> 
           rev: SDM2 scheme: MBR 
           ID-2: /dev/sdb vendor: Western Digital model: WDS240G2G0B-00EPW0 size: 223.58 GiB 
           block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 0000 
           scheme: GPT 
           ID-3: /dev/sdc type: USB vendor: Generic model: SD MMC size: 29.72 GiB block size: 
           physical: 512 B logical: 512 B serial: <filter> rev: 1.00 scheme: MBR 
Partition: ID-1: / raw size: 54.86 GiB size: 53.75 GiB (97.97%) used: 15.05 GiB (28.0%) fs: ext4 
           dev: /dev/sdb6 
           ID-2: /home raw size: 93.13 GiB size: 91.17 GiB (97.89%) used: 8.30 GiB (9.1%) 
           fs: ext4 dev: /dev/sda2 
Sensors:   System Temperatures: cpu: 46.0 C mobo: 46.0 C 
           Fan Speeds (RPM): N/A 
Repos:     Active apt repos in: /etc/apt/sources.list 
           1: deb http://liquorix.net/debian/ buster main
           2: deb http://www.bandshed.net/kernels/apt/ buster main
           3: deb [trusted=yes] https://cinelerra-gg.org/download/pkgs/debian10/ buster main
           4: deb https://dl.winehq.org/wine-builds/debian/ buster main
           Active apt repos in: /etc/apt/sources.list.d/brave-browser-release.list 
           1: deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ buster main
           No active apt repos in: /etc/apt/sources.list.d/connectify.list 
           Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list 
           1: deb http://deb.debian.org/debian/ buster-updates main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/debian.list 
           1: deb http://deb.debian.org/debian/ buster main contrib non-free
           2: deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free
           3: deb-src http://deb.debian.org/debian/ buster main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/kxstudio-debian-ppas.list 
           1: deb http://ppa.launchpad.net/kxstudio-debian/libs/ubuntu/ bionic main
           2: deb http://ppa.launchpad.net/kxstudio-debian/music/ubuntu/ bionic main
           3: deb http://ppa.launchpad.net/kxstudio-debian/plugins/ubuntu/ bionic main
           4: deb http://ppa.launchpad.net/kxstudio-debian/apps/ubuntu/ bionic main
           5: deb http://ppa.launchpad.net/kxstudio-debian/kxstudio/ubuntu/ bionic main
           Active apt repos in: /etc/apt/sources.list.d/kxstudio-external.list 
           1: deb [arch=amd64,i386] https://kx.studio/repo/ stable free
           2: deb [arch=amd64,i386] https://kx.studio/repo/ gcc5 free
           Active apt repos in: /etc/apt/sources.list.d/megasync.list 
           1: deb https://mega.nz/linux/MEGAsync/Debian_10.0/ ./
           Active apt repos in: /etc/apt/sources.list.d/mx.list 
           1: deb http://mirror.ufam.edu.br/mx/mx/repo/ buster main non-free
           2: deb http://mirror.ufam.edu.br/mx/mx/repo/ buster ahs
           Active apt repos in: /etc/apt/sources.list.d/skype-stable.list 
           1: deb [arch=amd64] https://repo.skype.com/deb stable main
           Active apt repos in: /etc/apt/sources.list.d/spotify.list 
           1: deb http://repository.spotify.com/ stable non-free
           Active apt repos in: /etc/apt/sources.list.d/teams.list 
           1: deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams stable main
           No active apt repos in: /etc/apt/sources.list.d/various.list 
Info:      Processes: 277 Uptime: 1m Memory: 7.69 GiB used: 758.7 MiB (9.6%) Init: SysVinit 
           v: 2.96 runlevel: 5 default: 5 Compilers: gcc: 8.3.0 alt: 8 Shell: quick-system-in 
           running in: quick-system-in inxi: 3.0.36 

Volume is at 100% in pavucontrol and it also seems normal in alsamixer

[pablogvieira]

Solved!
I opened QASMixer (I'm not really familiar with it) and for some reason the device inputs were disabled. Everything is working smoothly now. Sorry for bothering.

[AVLinux]

This sometimes happens when USB Audio devices are initialized for the first time, seems to have no rhyme or reason but once it's fixed it usually doesn't happen again..

And yes Qasmixer's UI in general is not terrible great, the dark theme doesn't help.. Using alsamixer from the terminal is just as effective, in fact I think I'll be removing the Qastools in the next release..