[vdr] Tuning failures for transponder-locked tuners (VDR 1.4.7)

Klaus Schmidinger Klaus.Schmidinger at cadsoft.de
Wed Oct 29 12:48:07 CET 2008


On 10/29/08 12:40, Richard F wrote:
> Teemu,
> 
> I had a similar problem with budget Freecom / WT-220U USB stick tuners.
> I usually had to swap multiplex/transponder to get them to re-tune reliably.
> I observed that if they lost tuning, vdr made them re-try (which I saw in the log)
> but eventually would bomb out if it couldn't tune, which is maybe what you're seeing?
> 
> Originally I logged it as a DVB driver bug, but the maintainer said it was an application bug.
> 
> I found the following, which requires you to patch/rebuild vdr from source.
> Basically it just adds a small delay to the tuning process, and it works 100% for me.
> 
> I had to do this on 1.4.7 and carried it over in 1.6.0 also - so no, vanilla 1.6 won't help you.
> 
> It would be good if something equivalent was in vanilla VDR but I suppose it slows 
> some systems by a fraction of a second when tuning.  
> Perhaps a  "budget card" option?
> 
> http://www.vdr-portal.de/board/thread.php?postid=639048
> The actual patch is at http://tafe.unkelhaeusser.de/vdr/dvbdevice.c.patch

I'm afraid I don't quite see why the applications would need to
do some arbitrary sleep here. If the driver requires this, why
doesn't it do it by itself?

Klaus



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