[linux-dvb] Re: Tuning problem

[Ralph Metzler <rjkm@convergence.de>]

Lauri Pesonen writes:
 > On Sun, Jan 06, 2002 at 06:34:19AM +0100, Ralph Metzler wrote:
 > > Stefan Norberg writes:
 > >  > >From personal experience and from following this list for a while I think
 > >  > it's
 > >  > pretty clear that the TT-DVB-C-card does not work with any version of the
 > >  > Linux
 > >  > driver.
 > > > 
 > >  > Unfortunately, the information on linuxtv.org and on technotrend's home page
 > >  > (claiming that there is a working driver for the TT-DVB-C card) is incorrect
 > >  > and should, imho, be removed. I would personally have tried harder to get a
 > >  > Siemens card if I haven't been misled by this fact.
 > > 
 > > I was under the impression from earlier reports (on the list and/or
 > > through mail to me) that the TT DVB-C card worked. Maybe they changed 
 > > the hardware? Somebody here talked about a 2.x version of the DVB-C
 > > card?
 > 
 > Based on the linuxtv.org web pages and the mailinglists I was under the 
 > impression that the TT DVB-C card would work with the linux driver. 
 > 
 > Yesterday it occurred to me that most DVB-C users on the list probably 
 > have a Siemens card and thus the problems with TT's card have not been 
 > found out earlier. 
 > 
 > !! Is there anyone on the list who has a TT DVB-C card working with the 
 > linuxtv.org DVB driver !!
 > 
 > My card has a "C-rev2.1" sticker on it. This is the same card that is 
 > identified as DVB-S by the linuxtv.org driver. 


That's probably because either tuner or demodulator are not identified
by the driver or something else went wrong. The default will always be
DVB-S in that case.

Based on your log not even the firmware was correctly on your card. 
So, either the driver does not know how to handle the card version you
have or something else is wrong with the card.


 
 > IMHO if you claim to develop a driver a driver which supports e.g. Siemens 
 > DVB-C cards, then you should at least try to support new card versions. 

But, AFAIK, there is no new Siemens DVB-C card version.
The TT version of the card always was a little different in layout. 
Now it seems they changed something else. 
Does anybody on this list own a TT DVB-C card which is not Rev. 2.1?


 > Especially since from the consumers point of view the card revisions 
 > aren't really that visible. That is, people don't know automatically which 
 > card revision they are buying. But since this is open source software, I 
 > understand that you cannot do everything. Come to think of it, I'm not 
 > sure whether you claim to support any card...
 > 
 > I'm just pissed at the moment since I was under the impression (my 
 > mistake) that the driver would work with all TT-based DVB cards. Now you 
 > are telling me that the driver will work with TT-based rev1.3 DVB-S cards 
 > only. Interworking with other cards will be an accident.


I said this is all I will be able to support in 4 weeks (if Convergence
goes down) since that's the only card I privately own.
That does not mean I would completely drop support for all other
versions, just that I could no longer actively work on those
cards myself.


 > > All I can do for now is to add a note on our WWW page that not 
 > > all card versions of all vendors work with the driver.
 > > In 4 weeks all this will probably be a moot point anyway and all I
 > > will be able to support then is a version 1.3 DVB-S card.
 > 
 > That's a pitty since I'd assume that the user group will probably not grow 
 > from this in the future. I'm assuming that rev1.3 cards aren't available 
 > any more...
 > 
 > TT claims to have a linux driver for their cards on request. I'll email 
 > them and see what they answer. If the driver is crap, we could all (or at 
 > least the TT DVB-C card owners) send an email to TT requesting them to 
 > support Ralph in the driver development.
 > 
 > Please note, that I'm very interested in getting the driver to support 
 > TT DVB-C cards, so I'd be very interested and willing to help in this 
 > project. 

Finding out if the card you have uses different tuner and 
demodulator chips would be a start.



Ralph





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