[mgrunt]

I also try run tvheadend as root...

[root@buildroot tvheadend]# dmesg | grep -i dvb
[ 5.618815] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in cold state, will try to load a firmware
[ 5.624133] usb 2-1.4: firmware: requesting dvb-usb-af9015.fw
[ 8.147206] dvb-usb: downloading firmware from file 'dvb-usb-af9015.fw'
[ 8.253233] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in warm state.
[ 8.255330] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[ 8.374279] DVB: registering new adapter (Afatech AF9015 DVB-T USB2.0 stick)
[ 8.450860] DVB: registering adapter 1 frontend 0 (Afatech AF9013 DVB-T)...
[ 8.503768] dvb-usb: Afatech AF9015 DVB-T USB2.0 stick successfully initialized and connected.

[root@buildroot tvheadend]# ls -l /dev/dvb/* -R
/dev/dvb/adapter0:
crw-rw-rw- 1 root video 212, 4 Jan 1 1970 demux0
crw-rw-rw- 1 root video 212, 20 Jan 1 1970 demux1
crw-rw-rw- 1 root video 212, 36 Jan 1 1970 demux2
crw-rw-rw- 1 root video 212, 9 Jan 1 1970 dsc0
crw-rw-rw- 1 root video 212, 5 Jan 1 1970 dvr0
crw-rw-rw- 1 root video 212, 21 Jan 1 1970 dvr1
crw-rw-rw- 1 root video 212, 37 Jan 1 1970 dvr2
crw-rw-rw- 1 root video 212, 3 Jan 1 1970 frontend0
crw-rw-rw- 1 root video 212, 7 Jan 1 1970 net0
crw-rw-rw- 1 root video 212, 23 Jan 1 1970 net1
crw-rw-rw- 1 root video 212, 39 Jan 1 1970 net2

/dev/dvb/adapter1:
crw-rw-rw- 1 root video 212, 68 Jan 1 1970 demux0
crw-rw-rw- 1 root video 212, 69 Jan 1 1970 dvr0
crw-rw-rw- 1 root video 212, 67 Jan 1 1970 frontend0
crw-rw-rw- 1 root video 212, 71 Jan 1 1970 net0

[root@buildroot tvheadend]# ./tvheadend -C
Mar 24 21:31:44 [ INFO]:START: initialising
Mar 24 21:31:44 [ INFO]:dvb: Found adapter /dev/dvb/adapter0 (AMLOGIC DVB-T) via PCI
Mar 24 21:31:44 [ INFO]:dvb: Found adapter /dev/dvb/adapter1 (Afatech AF9013 DVB-T) via USB (480 Mbit/s)
Mar 24 21:31:44 [ INFO]:dvb: Adapter /dev/dvb/adapter1 will run in filtered mode
Mar 24 21:31:44 [ INFO]:CSA: Using 32bit parallel descrambling
Mar 24 21:31:44 [ INFO]:epggrab: module eit created
Mar 24 21:31:44 [ INFO]:epggrab: module uk_freesat created
Mar 24 21:31:44 [ INFO]:epggrab: module uk_freeview created
Mar 24 21:31:44 [ INFO]:epggrab: module viasat_baltic created
Mar 24 21:31:44 [ INFO]:epggrab: module pyepg created
Mar 24 21:31:44 [ INFO]:epggrab: module xmltv created
Mar 24 21:31:44 [ INFO]:epgdb: loaded v2
Mar 24 21:31:44 [ INFO]:epgdb: channels 0
Mar 24 21:31:44 [ INFO]:epgdb: brands 0
Mar 24 21:31:44 [ INFO]:epgdb: seasons 0
Mar 24 21:31:44 [ INFO]:epgdb: episodes 0
Mar 24 21:31:44 [ INFO]:epgdb: broadcasts 0
Mar 24 21:31:44 [ INFO]:dvr: Creating new configuration ''
Mar 24 21:31:44 [WARNING]:dvr: Output directory for video recording is not yet configured for DVR configuration "". Defaulting to to "/root". This can be changed from the web user interface.
Mar 24 21:31:44 [ NOTICE]:START: HTS Tvheadend version 3.5.52~g819b8c8 started, running as PID:753 UID:0 GID:0, settings located in '/root/.hts/tvheadend'
Mar 24 21:31:45 [ ERROR]:dvb: "/dev/dvb/adapter1" tuning to "506,000 kHz" -- Front configuration failed -- Operation not supported, frequency: 506000000
Mar 24 21:32:05 [ ERROR]:dvb: "/dev/dvb/adapter1" tuning to "538,000 kHz" -- Front configuration failed -- Operation not supported, frequency: 538000000
^CMar 24 21:32:06 [ INFO]:epgdb: saved
Mar 24 21:32:06 [ INFO]:epgdb: brands 0
Mar 24 21:32:06 [ INFO]:epgdb: seasons 0
Mar 24 21:32:06 [ INFO]:epgdb: episodes 0
Mar 24 21:32:06 [ INFO]:epgdb: broadcasts 0
Mar 24 21:32:06 [ NOTICE]:STOP: Exiting HTS Tvheadend