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My USB dongle is recognized by the system but I have a problem with
the channels. Please read all my post for any help ;-)

At first, I used this guide:
http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers

After that "dmesg" showed that system was searching for
"isdbt_rio.inp" firmware. If I use that firmware from linuxtv.org,
"w_scan" shows me an error, it says that my dongle can't search for
TERRESTRIAL.

So, for using smsmdtv mode "DVB-T" as the default option, I forced the
kernel module in this way:

echo "options smsmdtv default_mode=0" | sudo tee /etc/modprobe.d/smsmdtv.conf

After that system searches for "dvb_rio.inp", good ;-)

dmesg:

[ 1327.312795] usb 1-3: new high-speed USB device number 4 using ehci-pci
[ 1327.446103] usb 1-3: New USB device found, idVendor=187f, idProduct=0600
[ 1327.446121] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1327.446130] usb 1-3: Product: MDTV Receiver
[ 1327.446138] usb 1-3: Manufacturer: MDTV Receiver
[ 1327.451833] usb 1-3: Direct firmware load failed with error -2
[ 1327.451849] usb 1-3: Falling back to user helper
[ 1327.456026] smscore_load_firmware_from_file: line: 1168: failed to
open firmware file "dvb_rio.inp"
[ 1327.456535] DVB: registering new adapter (Siano Rio Digital Receiver)
[ 1327.457351] usb 1-3: DVB: registering adapter 0 frontend 0 (Siano
Mobile Digital MDTV Receiver)...

I used "dvb_rio.inp" from my Windows installation (md5:
146156b55ce6fc586470f28194add5a7, sha1:
48907a4749ba5fd5b4b947195c0d484e55a4c169). Now I have this output form
"lsusb":

Bus 002 Device 002: ID 0402:7675 ALi Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 003: ID 0489:e03c Foxconn / Hon Hai
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 187f:0600 Siano Mobile Silicon
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

dmesg:

[ 1390.167433] usb 1-3: new high-speed USB device number 5 using ehci-pci
[ 1390.300895] usb 1-3: New USB device found, idVendor=187f, idProduct=0600
[ 1390.300913] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1390.300922] usb 1-3: Product: MDTV Receiver
[ 1390.300930] usb 1-3: Manufacturer: MDTV Receiver
[ 1390.776240] DVB: registering new adapter (Siano Rio Digital Receiver)
[ 1390.777275] usb 1-3: DVB: registering adapter 0 frontend 0 (Siano
Mobile Digital MDTV Receiver)...

lsmod | grep sms:

smsdvb 27513 0
dvb_core 125880 1 smsdvb
smsusb 17819 0
smsmdtv 53748 2 smsdvb,smsusb
rc_core 27389 1 smsmdtv

Finally I can scan and tune with a specific frequency but I can't
obtain services from multiplexes.

"w_scan -c IT" output:

w_scan version 20130331 (compiled for DVB API 5.10)
using settings for ITALY
DVB aerial
DVB-T Europe
scan type TERRESTRIAL, channellist 4
output format vdr-2.0
WARNING: could not guess your codepage. Falling back to 'UTF-8'
output charset 'UTF-8', use -C to override
Info: using DVB adapter auto detection.
/dev/dvb/adapter0/frontend0 -> TERRESTRIAL "Siano Mobile Digital MDTV
Receiver": good :-)
Using TERRESTRIAL frontend (adapter /dev/dvb/adapter0/frontend0)
---- Getting frontend capabilities----
Using DVB API 5.a
frontend 'Siano Mobile Digital MDTV Receiver' supports
INVERSION_AUTO
QAM_AUTO
TRANSMISSION_MODE_AUTO
GUARD_INTERVAL_AUTO
HIERARCHY_AUTO
FEC_AUTO
FREQ (44.25MHz ... 867.25MHz)
-----------------------_
Scanning 7MHz frequencies...
177500: (time: 00:00) (time: 00:01) signal ok:
QAM_AUTO f = 177500 kHz I999B7C999D999T999G999Y999
Info: no data from NIT(actual)
184500: (time: 00:15)
191500: (time: 00:18) (time: 00:19) signal ok:
QAM_AUTO f = 191500 kHz I999B7C999D999T999G999Y999
Info: no data from NIT(actual)
198500: (time: 00:33)
205500: (time: 00:36)
...
...

I created a file named "frequency" with this content for doing a test:

# T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy

T 177500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE # MUX-B Rai
T 698000000 8MHz 2/3 NONE QAM64 8k 1/8 NONE # Mediaset 1

and when I launch "dvbscan frequency" I obtain:

Unable to query frontend status.

With the utility "scan" I obtain:

scanning frequency
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 177500000 1 2 9 3 1 2 0
initial transponder 698000000 0 2 9 3 1 2 0
tune to: 177500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
tune to: 698000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
dumping lists (0 services)
Done.

WIth "dvbv5-scan frequency":

ERROR key/value without a channel group while parsing line 3 of frequency.

I tried to insert this options in /etc/modprobe.d/options:

options smsdvb force_lna_activation=1
options smsusb force_lna_activation=1
options dvb_rio force_lna_activation=1

to force Low Noise Amplifier but nothing changed.

Kaffeine is tuned with many frequency (Light green led) but can't
receive channels. The same with TvHeadend that doesn't obtain services
for multiplexes (but the signal is ok).

Do you have any advice? Thanks ;-)
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