You might try emailing Alan Stern about this. Could be related to kernel USB handling..
James
On 10 Jan 2014 16:30, "Kees van Veen" <kees.vanveen@xxxxxxxxx> wrote:
[James Stone]Not sure if it has anything to do with it, but I experience 'static' crackles on my Presonus 1818 as well.
Thanks for testing this.. Quite weird - so you are getting cracklesNo such systems around here, so that's unlikely to happen. I might be
even at 1024x3!!? That sounds really odd and definitely an
unacceptable performance. I have definitely not heard anything like
this on my device. I wonder if it is some kind of hardware fault. Are
you able to test it on a mac or windows comupter?
able to try it one of these days on different linux USB host hardware,
we'll see.
Have to try my old laptop still, but on my new one the crackles sometimes coincide (from watching tail -f) with
kernel: [12263.813466] usb_submit_urb: -16
in the syslog/kern.log, and an occasional
kernel: [12261.509328] retire_capture_urb: 2 callbacks suppressed
Do you have that as well ?
I'm on Ubuntu 13.10 / 3.11.0-15-lowlatency.
Thanks,
Kees
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