[vdr] Re: error channel switching

[Andreas@griemel.oche.de (Andreas Hoelscher)]

                                         Roetgen, Sa 22.09.01 19:16

> Andreas Hoelscher wrote:
>>
>>                                          Roetgen, Sa 22.09.01 09:29
>>
>> Hi,
>> since dvb driver snapshot 20.09.01 I can't switch channels anymore.
>> Snapshot 18.09.01 works fine (didn't test 19.09.01).
>>
>> - Kernel 2.4.7
>> - new Haupauge card
>> - only dvb driver directory compiled
>> - channel switching with vdr 0.95 (no patches)
>>
>> error messages :
>>
>> Sep 20 19:59:16 andreas2 vdr[1935]: ERROR (dvbapi.c,3280): Invalid
>> argument
>> Sep 20 19:59:21 andreas2 vdr[1935]: ERROR: timeout while tuning
>> Sep 20 19:59:21 andreas2 vdr[1935]: ERROR: channel 1 not sync'ed on
>> DVB card 1! Sep 20 19:59:21 andreas2 vdr[1935]: panic level: 0
>> Sep 20 19:59:21 andreas2 vdr[1935]: retrying
>> Sep 20 19:59:21 andreas2 vdr[1935]: ERROR (dvbapi.c,3280): Invalid
>> argument Sep 20 19:59:26 andreas2 vdr[1935]: ERROR: timeout while
>> tuning Sep 20 19:59:26 andreas2 vdr[1935]: ERROR: channel 1 not
>> sync'ed on DVB card 1! Sep 20 19:59:26 andreas2 vdr[1935]: panic
>> level: 0 Sep 20 19:59:26 andreas2 vdr[1935]: retrying

> I did some testing with the new "Inversion" frontend parameter Ralph
> has announced yesterday, but I don't think that this could be
> responsible for the errors you are observing.

> The current VDR version doesn't know about this new parameter, so the
> struct member in FrontendParameters may have some random value.
> However, the driver developers were smart enough to make the 'default'
> case in SetInversion() result to INVERSION_AUTO for the VES1893, and to
> INVERSION_OFF for the STV0299. In both cases all channels on Astra (as
> far as I have observed) should be receivable, because they all have
> INVERSION_OFF.

> For the moment I will do the following change to VDR's dvbapi.c, just
> to have the Inversion parameter initialized:

> -+- dvbapi.c    2001/09/21 14:14:28
> +++ dvbapi.c    2001/09/22 09:08:05
> @@ -3252,6 +3252,7 @@

>          FrontendParameters Frontend;
>          Frontend.Frequency = freq * 1000UL;
> +        Frontend.Inversion = INVERSION_AUTO;
>          Frontend.u.qpsk.SymbolRate = Srate * 1000UL;
>          Frontend.u.qpsk.FEC_inner = FEC_AUTO;

> @@ -3298,6 +3299,7 @@

>          FrontendParameters Frontend;
>          Frontend.Frequency = FrequencyMHz * 1000000UL;
> +        Frontend.Inversion = INVERSION_AUTO;
>          Frontend.u.qam.SymbolRate = Srate * 1000UL;
>          Frontend.u.qam.FEC_inner = FEC_AUTO;
>          Frontend.u.qam.QAM = QAM_64;

> What I don't yet know is: where can the information about the usage of
> "spectral inversion" be found? I don't see it in, e.g., the channel
> listing that comes with the Infosat magazine. Can it be determined
> automatically?

> Well, I guess this is not such a pressing matter, since everything
> appears to work fine on Astra.
I applied the patch but got the following error messages:

dvbapi.c:3255: `struct FrontendParameters' has no member named `Inversion'
dvbapi.c:3255: `INVERSION_AUTO' undeclared (first use this function)
dvbapi.c:3255: (Each undeclared identifier is reported only once
dvbapi.c:3255: for each function it appears in.)
dvbapi.c:3302: `struct FrontendParameters' has no member named `Inversion'
make: *** [dvbapi.o] Error 1


Andreas
-- 
Andreas H≈lscher, Buchenhain 8a, D-52159 Roetgen, Germany
(PGP ID: 1024/0x6AC897BB)