DVB kernel modules conflict with SDR. https://osmocom.org/projects/rtl-sdr/repository/revisions/0847e93e0869feab50fd27c7afeb85d78ca04631/entry/debian/rtl-sdr-blacklist.conf
This is a very thin module to ensure "plugdev" user exists and some udev rules are enabled, a prerequisite for using rtl-sdr.