[vdr] Re: error channel switching

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Andreas Hoelscher wrote:
> 
>                                          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

Are you using the *latest* CVS driver?

Klaus
-- 
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Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
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