[mythtv-users] Channel scan doesn't work

[Frank Schlimbach]

Am 20.12.2012 18:42, schrieb Jksj:
> On 19/12/12 19:46, schlimbo at gmx.de wrote:
>> Thanks for the tip.
>> I tried kaffeine and the same thing happens: I get "tuning failed"
>> when scanning.
>>
>> I have no idea how to proceed from here. Anyone have an idea what I
>> could try to find the issue? Anyone has a similar HW-config?
>>
>> Thanks
>>
>> frank
>>
>> -------- Original-Nachricht --------
>>> Datum: Wed, 19 Dec 2012 19:27:46 +0000
>>> Von: Jksj <jksjdevelop at gmail.com>
>>> An: Discussion about MythTV <mythtv-users at mythtv.org>
>>> Betreff: Re: [mythtv-users] Channel scan doesn\'t work
>>> On 19/12/12 09:09, schlimbo at gmx.de wrote:
>>>> Hi,
>>>> I am currently trying to switch from DVB-T to DVB-S. I installed a
>>> brand-new mythbuntu (with mythtv-0.25). It finds my DD cine s2 fine;
>>> I can't see
>>> any issues with dmesg, all looks good. However, neither the scan in
>>> mythtv
>>> not the command-line scans work.
>>>> I am using a quatro-lnb attached to a 5/8 multiswitch, telling Mythtv
>>> each tuner is attached to a LNB.
>>>> Using ZDF (for Astra) 11954000/hor/27500000 in mythtv-setup shows "no
>>> lock", signal strength 80%, signal/noise 74% for a while and then quits
>>> scanning without finding anything and reports a timeout.
>>>> The scan tool shows the following:
>>>>
>>>> myth at mythserver:~$ sudo scan /usr/share/dvb/dvb-s/Astra-19.2E
>>>> scanning /usr/share/dvb/dvb-s/Astra-19.2E
>>>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>>>> initial transponder 12551500 V 22000000 5
>>>>>>> tune to: 12551:v:0:22000
>>>> DVB-S IF freq is 1951500
>>>> WARNING: >>> tuning failed!!!
>>>>>>> tune to: 12551:v:0:22000 (tuning failed)
>>>> DVB-S IF freq is 1951500
>>>> WARNING: >>> tuning failed!!!
>>>> ERROR: initial tuning failed
>>>> dumping lists (0 services)
>>>> Done.
>>>>
>>>> Any idea, suggestions?
>>>>
>>>> frank
>>>>
>>>>
>>>> _______________________________________________
>>>> mythtv-users mailing list
>>>> mythtv-users at mythtv.org
>>>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>>> The easiest way, I have found to get dvb-s going is to test it first
>>> using Kaffeine --kill mythbackend first .Kaffeine seems to have the
>>> simplest satellite setup mechanism and it will at least prove the card,
>>> driver and dish are working before trying to set up Myth.
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>> _______________________________________________
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>> mythtv-users at mythtv.org
>> http://www.mythtv.org/mailman/listinfo/mythtv-users
> High when I was trying to get a tevii dvb-s2 card working I had
> similar symptoms. ie strong signal but tuning failure. In that case
> the fault was due to the firmware for the card failing to load. The
> linux driver still reported that all was well.
> The problem could be in the control back to the lnb.  Have you shown
> that the multiswitch and lnb are working as controlled by the card,
> perhaps by testing the card in windows with the software provided?

Finally made it work. No windows, no TV with DVB-S2 tuner, so it was a
little painful...but you were right, the switch/LNB weren't set up
correctly. Additionally, the tuner card's power/current supply turned
out to be insufficient.

Thanks for the hint, I should have checked more thoroughly right away.