dmesg | grep dvb
[ 1568.509600] dvb-usb: Found a 'afatech af9015 dvb-t usb2.0 stick' in cold state, will try to load a firmware
[ 1568.533148] dvb-usb: Did not find the firmware file. (dvb-usb-af9015.fw) please see linux/documentation/dvb/ for more details on firmware-problems. (-2)
[ 1568.533159] dvb_usb_af9015: Probe of 2-1:1.0 failed with error -2
[ 1568.533185] usbcore: Registered new interface driver dvb_usb_af9015
[ 4117.213985] dvb-usb: Found a 'afatech af9015 dvb-t usb2.0 stick' in cold state, will try to load a firmware
[ 4117.217478] dvb-usb: Did not find the firmware file. (dvb-usb-af9015.fw) please see linux/documentation/dvb/ for more details on firmware-problems. (-2)
[ 4117.217493] dvb_usb_af9015: Probe of 2-1:1.0 failed with error -2
[ 6311.936858] dvb-usb: Found a 'afatech af9015 dvb-t usb2.0 stick' in cold state, will try to load a firmware
[ 6311.940575] dvb-usb: Downloading firmware from file 'dvb-usb-af9015.fw'
[ 6312.009380] dvb-usb: Found a 'afatech af9015 dvb-t usb2.0 stick' in warm state.
[ 6312.009462] dvb-usb: Will pass the complete mpeg2 transport stream to the software demuxer.
[ 6312.081474] dvb-usb: Schedule remote query interval to 500 msecs.
[ 6312.081480] dvb-usb: Afatech af9015 dvb-t usb2.0 stick successfully initialized and connected.