https://bugzilla.kernel.org/show_bug.cgi?id=217088 Bug ID: 217088 Summary: xone23c mixer Product: Drivers Version: 2.5 Kernel Version: <5.4.0.33 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: kaufmich@xxxxxxxxxxx Regression: No Having a few problems with the Xone32c though not sure if this is an ALSA issue or general USB stack problem. It's a USB soundcard that is supposed to have 4 inputs and 4 outputs. It seems to have 2 USB configurations (bNumConfigurations : 0x2). When plugged in, bConfigurationValue is 0x1 and only 2 inputs and 2 outputs show up. Change this value to 0x2 and it shows up (as it should) as 4 inputs and 4 outputs. I can change the bConfigurationValue with this udev rule, or with a `echo 2 /sys/bus/usb/devices/1-1.4/bConfigurationValue`: This has all been working OK on Ubuntu 20.04 running kernel 5.4.0-33-generic. However, I just updated to 5.4.0-37-generic and now there is only a single USB configuration (bNumConfigurations : 0x1) and bConfigurationValue can't be changed to 0x2: -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
