Re: [alsa-devel] trying to get an eleven rack to work

David Alexander wrote:

kernel: [ 74.128035] usb 2-4: new high speed USB device number 2 kernel: [ 74.634592] ALSA mixer.c:1938 usbaudio: unit 32: unexpected type 0x09 kernel: [ 74.634606] snd-usb-audio: probe of 2-4:1.0 failed with error -5

0x09 is UAC2's EXTENSION_UNIT, which should not be a reason for failing. Please try the patch below.

Regards, Clemens

--- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1926,7 +1926,7 @@ static int parse_audio_unit(struct mixer_build *state, int unitid) return parse_audio_processing_unit(state, unitid, p1); default: snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]); - return -EINVAL; + return 0; } }