Re: [alsa-devel] [PATCH][ALSA] usbmidi support for Access Music synths.

Sebastien Alaiwan wrote:

I've replaced the QUIRK_COMPOSITE by a QUIRK_MIDI_FIXED_ENDPOINT, the module also probes (and fails) the USB interface 4 (I don't know what this interface is for on this device) which results in the printing of an error in the kernel log. How can I inform the snd-usb-audio driver that the USB interface 4 should be left alone?

With a QUIRK_IGNORE_INTERFACE for that interface. This means you need QUIRK_COMPOSITE again.

HTH Clemens