[linux-dvb] Re: DVD-Probs with v0.90

["Jean-Claude REPETTO" <jrepetto@francenet.fr>]

----- Original Message -----
From: Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>
To: <linux-dvb@linuxtv.org>
Sent: Tuesday, August 07, 2001 11:10 PM
Subject: [linux-dvb] Re: DVD-Probs with v0.90


> Jean-Claude REPETTO wrote:
> >
> > ----- Original Message -----
> > From: Matthias Weingart <matthias@pentax.boerde.de>
> > To: <linux-dvb@linuxtv.org>
> > Sent: Tuesday, August 07, 2001 6:23 PM
> > Subject: [linux-dvb] Re: DVD-Probs with v0.90
> >
> > > On Tue, Aug 07, 2001 at 06:08:07PM +0200, Klaus Schmidinger wrote:
> > > > Jean-Claude Repetto wrote:
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Frank Schneider" <f.schneider@mb-schneider.de>
> > > > > To: <linux-dvb@linuxtv.org>
> > > > > Sent: Tuesday, August 07, 2001 5:21 PM
> > > > > Subject: [linux-dvb] DVD-Probs with v0.90
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > when I play a DVD i have all 10 Sec. horizontally flickers.
> > > > > >
> > > > > > I have vdr 0.90 and driver's from 03.08.2001
> > > > > > I have an IDE DVD-LW.
> > > > > >
> > > > > > How can I solve it?
> > > > > > Thank you .
> > > > > >
> > > > > >
> > > > > It seems that you have the same problem as I have. Do you have
also
> > audio
> > > > > drop-outs at the same time ? What CPU do you have ?
> > > > > Please read my message sent to this list on 2 august, at 11:20 pm
and
> > look
> > > > > at your CPU charge with the "top" utility.
> > > > > There is a task, named "dvb_mon", that uses generally 0% CPU, but
> > every 10
> > > > > or 15 seconds it uses up to 40 or 50% CPU, and then the problems
> > appears.
> > > > > BTW, can somebody explain what exactly is the "Dvb_mon" task ?
> > > > >
> > > > > Best regards,
> > > > >
> > > > > Jean-Claude
> > > >
> > > > As far as I understand it 'dvb_mon' is the part of the DVB driver
that
> > > > does the channel tuning.
> > > > I guess what's kicking in every now and then is the AFC function.
> > > > See DVB/driver/dvb.c for details.
> > >
> > > Uuups, maybe vdr should disable channel tuning at all when playing
dvd's?
> > > With only one card and no EPG this should be possible. If vdr already
> > > disabling this, try switch off background epg scanning. Maybe that
will
> > > solve your problem.
> > >
> > >         Matthias
> > >
> >
> > You are right. I've just commented out a line in vdr.c :
> > //     EITScanner.Process();
> > and now it is working perfectly (excepting small bugs).
> >
> > Klaus, should it be possible to disable EIT scanning during DVD play ?
This
> > could be a compilation option, for owners of older PC (I have a Pentium
200
> > MMX).
>
> The EIT scanner is automatically turned off during replay (but only for
the
> card that actually does the replay). See cDvbApi::SetModeReplay():
>
>      if (siProcessor)
>         siProcessor->SetStatus(false);
>
> How many cards do you have in your system?
>
> Klaus

Now, I understand better was is happening. I have a second card , a Win-TV
Nova, but as I have only one dish at present, there is no LNB connected to
the Nova. I didn't think that vdr would use it.
So the DVB driver was trying to tune channels in the noise, that's why it
took a lot of CPU charge. I have just connected the LNB cable to the Nova,
and now, when I play a DVD, I have no more problems.

BTW, I plan to install a second dish for HotBird (the first is for Astra) .
AFAIK, such a configuration is not supported by VDR, because there is only
one channels.conf file, and one setup for the LNB LO frequencies. Do you
plan to add support for it in the future ?

Jean-Claude




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