[linux-dvb] Re: Regaining lock

[Johannes Stezenbach <js@convergence.de>]

Johannes Stezenbach wrote:
> Hamish Moffatt wrote:
> > Hi. I have two DVB cards which behave a bit differently when they lose
> > lock. One will regain lock automatically (eg if you unplug the antenna
> > and then reconnect it); the other must be retuned by user-space software
> > before it will relock.
> > 
> > The Avermedia DVB-T card (dvb-bt8xx + sp887x) will regain lock by
> > itself. The DPANDA.com.au card (budget-ci + tda1004x) will not regain
> > lock until retuned.
> > 
> > Is this a hardware difference, or a driver difference?
> 
> sp887x.c sets the FE_CAN_RECOVER flag, meaning the FE will regain
> lock on its own. tda1004x.c does not, meaning that dvb_frontend.c
> should do the necessary steps to regain lock.
> 
> 
> > The relock behaviour is more helpful. For reasons I don't understand, my
> > dpanda card lost lock a couple of times tonight while recording with
> > MythTV, and unfortunately then I get nothing until the next channel
> > change (or Myth restart).
> > 
> > OTOH if user space is meant to monitor and initiate a retune, I'll work
> > on a patch for Myth...
> 
> It is not. There must be a bug in dvb_frontend.c or tda1004x.c.

BTW, you didn't say which driver version you use. I hope we are
not talking about old bugs?

Johannes