Eric Smith wrote: > could use some advice on how I might go about debugging the problem > if it is in the ftdi_sio driver. As a data point you could compare the userspace approach with libftdi1. //Peter -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html