On Sat, Jul 16, 2011 at 10:23 AM, Nicolai Krakowiak <nicolai.krakowiak@xxxxxxxxx> wrote: > On Wed, Jul 13, 2011 at 5:27 AM, Daniel Mack <zonque@xxxxxxxxx> wrote: >> Can you check the value of the "ctrlif" argument in snd_usb_create_mixer()? > > Two instances: ctrlif = 0, ctrlif = 3. Here's the relevant kernel > log snippet: Interface 3 is the MIDI streaming interface, and snd_usb_create_mixer() shouldn't find any controls there. I assume there is a confusion in the usage of mixer->chip_ctrl_if, and the code there also seems wrong. Can you test whether the attached patch fixes the problem for you? Thanks, Daniel
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0001-ALSA-snd-usb-operate-on-given-mixer-interface-only.patch
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