On 05/17/16 18:53, Karl Denninger wrote:
If this is a condition of some sort in the device or driver I've not
been able to figure out what it is, or how to force it to clear -- or to
prove whether it's in the device or the ugen driver.

Any ideas?


The most easy way to know this for sure, is to check the real data traffic using usbdump:

usbdump -i usbusX -f Y -s 65536 -vvv

My guess is there is some data toggle issue, and that the USB stack tries to clear some error using a clear-stall command, which possibly your device does not handle properly.

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