[linux-dvb] Re: full featured card without signal and required video memory investigation

[Oliver Endriss <o.endriss@gmx.de>]

On Friday 11 July 2003 11:24, Gregor Lawatscheck wrote:
> At 06:24 11/07/2003, you wrote:
> >On Friday 11 July 2003 01:21, Gregor Lawatscheck wrote:
> > > At 22:20 10/07/2003, you wrote:
> > > > > Either your revision of the card makes a difference or you're
> > > > > in the lucky position that somehow vdr or the driver just
> > > > > never touches the tuning part of the dvb-s.
> >
> >Add a printk to SetPIDs() (av7110.c) and verify that the pids are
> > set to zero when there is no signal. av7110_before_after_tune()
> > calls SetPIDs(0,0,0,0,0) if the frontend looses signal.
> >AFAIK this code was added to avoid arm crashes...
>
> OK, thanks I'll  check that once I have the box up running again.

I assume that you have already disabled
- EPG scan timeout and
- Set system time 
in EPG setup, right? Just to simplify things.

> > > > > What revision is you full dvb-s card? I've got a 1.3 here.
> > > > > Which version of vdr are you using? How's your EPG setup for
> > > > > vdr - standard or altered so it doesn't scan at night?
> > > >
> > > >I think the DVB-s is a 2.1 - no J2 connector
> > >
> > > Most interesting. I'm getting a 1.6 from ebay with broken tuner
> > > soon. Let's see whether there's any difference there. It it even
> > > feasible to assume it could be the revision of the card that
> > > makes a difference here?
> >
> >The 1.3. has a different frontend chip.
> >I tested my Rev. 2.1 Nexus (stv0299-based) without sat signal: It
> > did not crash within several hours. How long does it take in your
> > setup until the arm crashes?
>
> It takes around 4-6 hours. Before that the load goes to around 40-50%
> if tuned to  a sat channel without having signal. It only recovers on
> reloading the drivers. The tuner of my 1.3 says BSRV2-301A.

Ok, I'll check again tonight for a longer period. 

FYI, I'm using this setup:
- AMD K6-II 400 MHz
- linux kernel 2.4.21 from kernel.org
- single DVB-S Nexus 2.1
- DVB driver CVS 2003-06-28
- vdr-1.2.1 + remote control plugin
- no other plugins, no patches

I simply removed the sat cable from the box. Then the [kdvb-fe-0:0] 
frontend process consumes approx. 30% cpu while it tries to retune. 
AFAIK this is normal behaviour.

Then I played some recordings. Nothing happened.

> So it looks like it could be the revision and together with Andy
> Carter there are now two people who don't appear have this problem
> with a Rev 2.1. Good news for everyone thinking about using a full
> featured card without a signal for decoding. The only thing a Rev 2.1
> is lacking is RGB output, right?

Yes.

> I suppose a lot of people don't intend to use it anyway?

Maybe. RGB is a nice feature if you have a high-quality TV set. 
AFAIK the Rev. 1.6 has the same frontend as the 2.1 _and_ it has the J2 
jumper block..

Anyway, I think it's possible to fix the problem when the problem has 
been identified.

Oliver


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