[linux-dvb] How to use scan-s2?

Alex Betis alex.betis at gmail.com
Sun Jan 25 17:56:05 CET 2009


On Sun, Jan 25, 2009 at 6:29 PM, Hans Werner <HWerner4 at gmx.de> wrote:

> > On Sun, Jan 25, 2009 at 4:41 PM, Hans Werner <HWerner4 at gmx.de> wrote:
> >
> > > > If you have a stb0899 device, don't forget to add "-k 3".
> > >
> > > Oh. Can someone say what's different about the stb0899 here,
> > > and how -k 3 helps ?
> >
> >
> > Since I've added it, I'll try to defend it :)
> >
> > stb0899 driver (or maybe the chip?) has some buffers inside that are not
> > reset between tunnings.
> > In that case messages from *previous* channel will arrive after the
> > tunning
> > to new channel is complete.
> > Those messages will create a big mess in the results, such as channels
> > without names, duplicate channels on different transponders.
> > -k option specifies how many messages should be ignored before processing
> > it. I couldn't think of a more elegant way to ignore messages from
> > previously tuned channel. I use "-k 3" by myself, but after playing
> around
> > with "-k 2" saw that its also working. "-k 1" was still not enough.
> >
> > The proper way is to have an option to reset that buffer in the driver
> > after
> > tunning.
> > Since I don't know how it can be done and how it will affect tunning of
> > channels for viewing, I didn't want to go that way and solve it in
> > scan-s2.
> >
> > Regards,
> > Alex.
>
> OK, thanks, I will check if I see that problem. Which card(s)
> did you see this with?
> Hans

I'm aware only about Twinhan 1041 and TT-3200 based stb0899 cards. Both have
the same problem.


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