[linux-dvb] Re: dvb-kernel/stv0299 cvs >20040224

[Andrew de Quincey <adq_dvb@lidskialf.net>]

On Friday 12 March 2004 21:27, Kenneth Aafløy wrote:
> On Friday 12 March 2004 22:16, you wrote:
> > On Friday 12 March 2004 20:42, Kenneth Aafløy wrote:
> > > Hi,
> > >
> > > i've discovered that in cvs dvb-kernel above 20040224 tuning with
> > > mythtv is broken, but szap still works. The only difference between the
> > > two I can see is that szap uses FE_READ_STATUS, and mythtv uses
> > > FE_GET_EVENT to read the frontend status. Now, mythtv does indeed
> > > receive those events, but never with a status of |LOCK. What am i
> > > missing here? Is this a frontend bug, or application bug?
> > >
> > > Hauppauge Nexus-S (STV0299: BSRU6, TDQB-S00x)
> >
> > Odd; dvbtune (which uses the event interface) still works OK..... I
> > wonder what mythtv is doing differently.
>
> Doing some reading of the diff between 20040224 and 20040225 i noticed some
> changes to accomodate for FE_CAN_INVERSION_AUTO. Now, all my channels had
> been pre-set with INVERSION_OFF (because the mythtv dvb stuff is kind
> enough to warn about unsupported features of the frontend), and when I
> change this to INVERSION_AUTO all works well. So i guess it's a frontend
> bug then..

Aha! Its a actually a bugfix which causes this. 

Previously the stv0299 frontend driver was always doing a nasty hack for 
inversion which I removed, because it broke tuning to low symbol rate 
channels. Unfortunately the side effect is that if the inversion is set 
wrongly from the client side, it will not work.


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