[linux-dvb] Re: Holding tuned frequency after szap!

[Holger Waechtler <holger@qanu.de>]

Johannes Stezenbach wrote:

> Andrew de Quincey wrote:
>  
> > On Wednesday 03 March 2004 17:06, Kelvin Woods wrote:
> >    
> > > I'm sure I've read (on this list I believe) that after you tune your DVB
> > > card with szap the card will lose the frequency after a few seconds.
> > > This indeed is easily observable. If you don't keep szap running the
> > > card loses the frequency with several seconds. I believe that some
> > > method has been offered on how to prevent this. Does anyone here know
> > > what that might be?
> > >      
> > options dvb-core dvb_shutdown_timeout=0 
> >    
> BTW, I'm not sure what this timeout is good for at all. IMHO one
> either wants the frontend power to stay on when the frontend
> is closed (i.e. power down only when someone explicitly uses the
> appropriate ioctl), or one wants to power down immediately.
>  
You can shorten the initialisation time after powerup because you might 
not need to reload the firmware in case you pass control over the DVB 
devices from one application to another.

Thus frontend powerdown can be delayed if necessairy, this was a feature 
request by the Convergence middleware developers once, don't know 
whether this is still required...

Holger




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