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Probing this device currently fails in snd_usb_audio_probe() because the call to snd_usb_create_mixer() fails. This is due to unknown or non-standard interface descriptor subtypes in parse_audio_unit(): usbaudio: unit 51: unexpected type 0x09 snd-usb-audio: probe of 1-8:1.0 failed with error -5 Some people are working around this by recompiling usb-audio with the call to snd_usb_create_mixer() commented out. It would be nice to avoid that. While the best idea would be to look into the mixer creation failure, a reasonable short-term solution is to use quirks to only probe the trouble-free interfaces. This allows audio and MIDI interfaces to be used without any obvious issues. Interface 0 is the main one to ignore. It contains lots of control-fu, including the unexpected interface descriptor subtypes. Interface 5 is for firmware updates and I'm not sure how to get support for this. Interface 3 is some sort of control interface that I don't understand: Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 9 bInCollection 1 baInterfaceNr( 0) 1 Signed-off-by: Martin Schwenke <martin@meltin.net> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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.. | ||
6fire | ||
caiaq | ||
misc | ||
usx2y | ||
card.c | ||
card.h | ||
clock.c | ||
clock.h | ||
debug.h | ||
endpoint.c | ||
endpoint.h | ||
format.c | ||
format.h | ||
helper.c | ||
helper.h | ||
Kconfig | ||
Makefile | ||
midi.c | ||
midi.h | ||
mixer_maps.c | ||
mixer_quirks.c | ||
mixer_quirks.h | ||
mixer.c | ||
mixer.h | ||
pcm.c | ||
pcm.h | ||
power.h | ||
proc.c | ||
proc.h | ||
quirks-table.h | ||
quirks.c | ||
quirks.h | ||
stream.c | ||
stream.h | ||
usbaudio.h |