On Fri, 5 Jul 2013, James Stone wrote: > On Fri, Jul 5, 2013 at 3:32 PM, Alan Stern <st...@rowland.harvard.edu> wrote: > > On Fri, 5 Jul 2013, James Stone wrote: > > > >> I agree the original unable to submit urb bug has been fixed. I have > >> gone through the output trace, but I can't see anything like you were > >> suggesting. > >> > >> I can submit the whole file (700k) somewhere if you like? > > > > You can email it to me off-list. > > > Thanks! > > Here it is.
The file is clear enough, but I don't understand why things happened the way they did. The first half is audio-out only. About 2 seconds after the start, the audio-in stream starts up. After 2 URBs (2 ms) of data, everything is shut down for no apparent reason -- there were no I/O errors. 1/2 second after that, the audio-out stream starts up again, and a little less than 1/2 second later, the audio-in stream starts too. Once again, everything gets shut down down after only 2 audio-in URBs. After another 1/2 second, the audio-out stream gets restarted once more. The trace ends a little less than 1/2 second after that, and there is no more audio-in. I can't tell whether all these starts and stops are caused by JACK or by the ALSA layer, let alone figure out the reason for them. Perhaps running JACK under strace would help? I have no idea -- this is out of my league now. Clemens is your best bet at this point. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
