Alsa - has invalid interface number

[smangels]

hi, I'm running the latest ArchLinux installation using a Behringer Flow8 as my main audio interface. Today I'm running into an issue where the USB audio hardware can not be loaded successfully.

[ 1690.797522] usb 1-3.1.1.4: new high-speed USB device number 14 using xhci_hcd
[ 1690.891936] usb 1-3.1.1.4: config 1 has an invalid interface number: 7 but max is 5
[ 1690.891940] usb 1-3.1.1.4: config 1 has no interface number 5
[ 1690.892620] usb 1-3.1.1.4: New USB device found, idVendor=1397, idProduct=050d, bcdDevice= 2.10
[ 1690.892624] usb 1-3.1.1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=6
[ 1690.892627] usb 1-3.1.1.4: Product: FLOW 8
[ 1690.892628] usb 1-3.1.1.4: Manufacturer: Behringer
[ 1690.892630] usb 1-3.1.1.4: SerialNumber: 18-04-ED-FB-BE-A0

The following Alsa related packages have been upgraded.

[2022-09-19T18:22:14+0200] [ALPM] upgraded alsa-card-profiles (1:0.3.57-1 -> 1:0.3.58-1)
[2022-09-19T18:22:15+0200] [ALPM] upgraded pipewire-alsa (1:0.3.57-1 -> 1:0.3.58-1)
[2022-09-19T23:07:36+0200] [PACMAN] Running 'pacman -Sy alsa-tools'
[2022-09-19T23:07:38+0200] [ALPM] installed alsa-tools (1.2.5-1)

Kernel and UDEV version Linux archlinux 5.19.9-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 15 Sep 2022 16:08:26 +0000 x86_64 GNU/Linux udev version 251

[smangels]

The USB audio interfaces are not shown in Gnome Settings but appear as OFF in PavuControl.

[perexg]

Those messages are from the kernel. Most likely, you're hitting this kernel bug (kernel 5.19.9):

https://bugzilla.kernel.org/show_bug.cgi?id=216500

[smangels]

Yes, I can confirm that downgrading to 5.19.8 solved that issue. Thanks for the hint @perexg