# istrain — keep the kernel DVB-T driver off the RTL-SDR dongles so SDR apps (rtl_airband, rtl_fm) own
# them via libusb. Without this, dvb_usb_rtl28xxu claims a dongle at boot and rtl_airband hangs on
# "Allocating zero-copy buffers" (rtl_fm auto-detaches, rtl_airband does not). These dongles are SDR-only.
#
# Deploy (sudo):  sudo cp blacklist-rtl-sdr.conf /etc/modprobe.d/  &&  sudo modprobe -r dvb_usb_rtl28xxu
# (the modprobe -r frees it for THIS session without a reboot; the file keeps it off after reboot)
blacklist dvb_usb_rtl28xxu