Hi , i am using a usb composite device having usb - hid and usb - audio interface with linux machine as usb host . i am trying to do digital audio streaming over usb audio class interface . when i stream audio , kernel produces these logs very frequently . ALSA sound/usb/usbaudio.c:351: frame 0 active: -18 . upon seeing documentation , -18 comes to be EXDEV (#define EXDEV 18 /* Cross-device link */) . whenever this problem comes , the kernel does not crash but sound glitch comes , and then system automatically recovers after some time , and audio is resumed . can i be guided , why this problem comes and how to solve this problem . waiting for reply . thanx & regards amit nagal -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html