[linux-dvb] Hauppauge/Technotrend DVB-C 2.1 vs. QAM256

Andrew de Quincey adq_dvb at lidskialf.net
Sat Apr 29 22:10:01 CEST 2006

On Thursday 27 April 2006 21:53, Michael Brakemeier wrote:
> Hi,
> yesterday my cable-provider (ish, germany) changed many channels from
> QAM64 to QAM256 modulation. Video and Audio on lower frequency
> (113MHz) channels are now unusable (heavily distorted) using my
> Technotrend DVB-C Rev. 2.1, nevertheless recording with my Terratec
> Cinergy 1200 DVB-C works fine.
> Since this seems to be a very common problem with this Technotrend
> card, is there any ongoing development to fix this? Is it actually possible
> to fix this?
> Maybe someone could give me a hint for some changes or a pointer to
> an "unofficial" patch I can try?
> Btw, I'm using the current mercurial tree with kernel

Is this an stv0297 based card? You see there are two stv0297 drivers: stv0297, 
and stv0297_cs2.

The latter is currently cablestar2 specific, but also looks like it has been 
greatly improved (the tuning is different so it may fix your issue).

I'm intending to generalise it and merge/replace the former with it. Would you 
be willing to test patches for me to see if this can be done?

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