On Sun, Jun 17, 2012 at 10:33 PM, Ellis Whitehead
<ellis.whiteh...@gmail.com> wrote:
>>> You can produce detailed debug log if you set the environmental
>>> variable LIBUSB_DEBUG to 4. That debug log may help to identify
>>> the potential problem.
>
> Ok, I've uploaded it here:
> http://gcead.sourceforge.net/libusbx-debug-20120617.log
> I issued the command to start recording at timestamp [12.054910].  Due
> to the large number of debug lines, I stopped recording at
> [12.528804].  Shutdown was at [18.014753].
>

Indeed this looks like a potential problem in the Mac OS X backend.

What is the Mac OS X version you are using? Could you post
the details about your device (eg: USB Prober output about
your device, or "lsusb -vvv" under Linux or the USBView
output under Windows)?

I do not know much about the details of the OS X backend but hopefully
others can help you here.


-- 
Xiaofan

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