code=12 is an I/O error, most likely due to the same thing as in comment #11: poll() is timing out for some reason when trying to transfer an URB.
I'm not sure why that would happen.
code=12 is an I/O error, most likely due to the same thing as in comment #11: poll() is timing out for some reason when trying to transfer an URB.
I'm not sure why that would happen.