With kernel 4.8.0-01558-g21f54dd I get thousands of"dvb-usb: bulk message failed: -11 (1/0)"messages in the logs and the DVB adapter is not working.It tourned out the new config option VMAP_STACK=y (which is the default)is the culprit.No problems for me with VMAP_STACK=n.Thanks, Jörg