Behringer UCM204HD shows only both lines (4 speakers)

[Udrys]

Hi,
I'm noob on linux so please don't beat me very hard :) I have Linux Mint 22 (Kernel 6.8.0-40-generic and Mint 21.3 had the same problem). So my UCM204HD shows only one 4 speaker channel. Not separate like on Windows or Debian. I tried to update configuration from this page but there are no difference. Maybe I'm missing something? Could you please help me? Thank you very much.

P.s. Apparently it's absolutely doesn't matter what I do with /usr/share/alsa files, they don't change anything.

[perexg]

I am sorry, but you may consult your issue with the community for your distro. If other distribution is working then it's does not look like a general issue.

[stephematician]

@Udrys - I agree with @perexg, this sounds distribution-specific rather than an issue with UCM. You would be better off seeking help in more general forum.

I have a similar UMC202HD and the UCM works fine; e.g. in a terminal

stephematician@home:~$ alsaucm listcards
  0: hw:4
    BEHRINGER UMC202HD 192k at usb-0000:05:00.4-1.3, high speed
stephematician@home:~$ alsaucm open hw:4

configures the device to have separate input channels, which I can confirm via arecord --list-devices.

Even without the open command in alsaucm - on my machine, PipeWire automatically opens the device with UCM, so any application that uses PipeWire (or PulseAudio) sees the separate (input) channels.

[Udrys]

Apparently this is a bug in Canonical kernel.... Because distribution that has this problem is Mint(main version) and LMDE 6 don't.... I have not tried Ubuntu, but I bet you any money that it will have same problem...