[linux-dvb] Tuning problems

Ian W Roberts ianwroberts at internode.on.net
Thu Jul 3 11:32:23 CEST 2008


Dear All,

I just hg'ed a new clone from http://linuxtv.org/hg/v4l-dvb this 
evening; cleaned out the old kernel modules; re compiled and installed 
and...

It works! :-)

I'm sure I tried exactly the same process a couple of times this week 
without success but I'm happy now.

Thanks to whoever fixed it.

bye

ian

Ian W Roberts wrote:
> My Gigabyte U7000-RH was working until last night when I upgraded to a
> new kernel build -I'm running Ubuntu 8.04 and (now) 2.6.22-15-generic. :-(
>
> Since then the device can't tune and I don't know how to troubleshoot
> the problem. :-(
>
> I've tried re-making and and re-installing the the v4l-dvb. I've tried
> hg-ing a new clone from http://linuxtv.org/hg/v4l-dvb (and remaking &
> re-installing). I've tried 'make rminstall' and 'make distclean'
> followed by 'make; sudo make install'. I've placed a copy of the
> firmware in /lib/firmware/2.6.22-15-generic/
>
> When I connect my dvb-t dongle /var/log/messages look fine:
>
> ------------------------------------------------------------------------
> Jul 2 08:55:12 squash kernel: [ 491.125748] dvb-usb: found a 'Gigabyte
> U7000' in cold state, will try to load a firmware
> Jul 2 08:55:12 squash kernel: [ 491.143173] dvb-usb: downloading
> firmware from file 'dvb-usb-dib0700-1.10.fw'
> Jul 2 08:55:12 squash kernel: [ 491.225304] dib0700: firmware started
> successfully.
> Jul 2 08:55:13 squash kernel: [ 491.434683] dvb-usb: found a 'Gigabyte
> U7000' in warm state.
> Jul 2 08:55:13 squash kernel: [ 491.434729] dvb-usb: will pass the
> complete MPEG2 transport stream to the software demuxer.
> Jul 2 08:55:13 squash kernel: [ 491.434822] DVB: registering new adapter
> (Gigabyte U7000)
> Jul 2 08:55:13 squash kernel: [ 491.578413] DVB: registering frontend 0
> (DiBcom 7000PC)...
> Jul 2 08:55:13 squash kernel: [ 491.601338] input: IR-receiver inside an
> USB DVB receiver as /class/input/input7
> Jul 2 08:55:13 squash kernel: [ 491.601358] dvb-usb: schedule remote
> query interval to 150 msecs.
> Jul 2 08:55:13 squash kernel: [ 491.601362] dvb-usb: Gigabyte U7000
> successfully initialized and connected.
> ------------------------------------------------------------------------
>
> When I try scanning for stations:
> ------------------------------------------------------------------------
> scanning /usr/share/doc/dvb-utils/examples/scan/dvb-t/au-Adelaide
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> initial transponder 226500000 1 3 9 3 1 1 0
> initial transponder 177500000 1 3 9 3 1 1 0
> initial transponder 191625000 1 3 9 3 1 1 0
> initial transponder 219500000 1 3 9 3 1 1 0
> initial transponder 564500000 1 2 9 3 1 2 0
>   
>>>> tune to: 
>>>>         
> 226500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 226500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE 
>
> (tuning failed)
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 177500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 177500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE 
>
> (tuning failed)
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 191625000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 191625000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE 
>
> (tuning failed)
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE 
>
> (tuning failed)
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 564500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE
> WARNING: >>> tuning failed!!!
>   
>>>> tune to: 
>>>>         
> 564500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE 
>
> (tuning failed)
> WARNING: >>> tuning failed!!!
> ERROR: initial tuning failed
> dumping lists (0 services)
> Done.
> ------------------------------------------------------------------------
>
> My initial tuning data is:
> ------------------------------------------------------------------------
> more /usr/share/doc/dvb-utils/examples/scan/dvb-t/au-Adelaide
> # Australia / Adelaide / Mt Lofty
> # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> # ABC
> T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> # Seven
> T 177500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> # Nine
> T 191625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> # Ten
> T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> # SBS
> T 564500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE
> ------------------------------------------------------------------------
>
> Any suggestions?
>
> bye
>
> ian
>
>
> Ian W Roberts wrote:
>   
>> stev391 at email.com wrote:
>>   
>>     
>>> Ian,
>>>
>>> Try updating to the latest scan file from the dvb-apps mercurial.  
>>>
>>> Channel 7 have changed their parameters in the last year and some tuners automatically try other combinations then instructed, that is why it is working with one and not the other.
>>>
>>> The new Channel 7 parameters are:
>>> # Seven
>>> T 177500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
>>>   
>>>     
>>>       
>> Brilliant, that worked! :-)
>>
>> I had tried changing the guard interval to 1/16 which seemed to change 
>> the behaviour subtly but didn't achieve successful tuning. Changing that 
>> 4 parameter (FEC High?) to 3/4 as well means my device works fine now. 
>>
>> Thanks
>>
>> ian
>>   
>>     
>>> As for the SBS problem it might be just poor reception or the tuner wasn't designed for the Australian frequencies correctly.
>>>
>>> Regards,
>>> Stephen.
>>>
>>>
>>>
>>> <Original  Message>
>>> Dear Linux-DVBers,
>>>
>>> I now own two USB DVB-T receivers (dongles): a Gigabyte U7000-RH and a
>>> digitalNow tinyUSB2.
>>>
>>> I use them on my Kubuntu 7.10 workstation.
>>>
>>> I've had the digitalNow for a year or so and it has been working fine
>>> (and easy to get going) with kaffeine except that I couldn't receive SBS
>>> reliably (in Adelaide, Australia) although I was able to tune to it from
>>> time to time. With the Tour de France starting next week (coverage
>>> broadcast by SBS), I took a punt yesterday and bought a Gigabyte
>>> U7000-RH and, yes, it too was easy to get going, and, luckily, receives
>>> SBS nicely -but it can't tune to Channel 7 at all!
>>>
>>> My kaffeine installation now has a channel list that covers all the
>>> local terrestrial TV stations. If I connect the digitalNow device, I can
>>> watch 2, 9, 7 & 10 and if I connect the Gigabyte device I can watch SBS,
>>> 2, 9 and 10.
>>>
>>> I'm presuming that means that by channel tuning data is OK. I don't know
>>> whether it's relevant, but I notice that SBS seems to be the highest
>>> frequency local station and Channel Seven seems to be the lowest. There
>>> seems to be a problem with both devices at the opposite ends of the
>>> frequency range.
>>>
>>> Any suggestions? (other the juggling the two devices!)
>>>
>>> bye
>>>
>>> ian
>>>
>>>      # Australia / Adelaide / Mt Lofty
>>>      # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
>>>      # ABC
>>>      T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
>>>      # Seven
>>>      T 177500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE
>>>      # Nine
>>>      T 191625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
>>>      # Ten
>>>      T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
>>>      # SBS
>>>      T 564500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE
>>>
>>>
>>>   
>>>
>>> -- 
>>> Be Yourself @ mail.com!
>>> Choose From 200+ Email Addresses
>>> Get a *Free* Account at www.mail.com <http://www.mail.com/Product.aspx>!
>>>     
>>>       
>>   
>>     
>
>
>   





More information about the linux-dvb mailing list