[linux-dvb] Strange Mantis tuning errors

Manu Abraham abraham.manu at gmail.com
Sun Nov 26 09:15:02 CET 2006


Mattias Bergsten wrote:
> Hi,
> 
> I'm using the prerelease Mantis drivers + patches from the list to drive
> a 2033 CAB-CI card (1822:0008).
> 
> This works (except the CI part), but is very unreliable. Sometimes
> tuning does not work on bootup, sometimes it works fine for several
> hours until you stop watching or tune to different channels too fast.
> This is an example of what I get in dmesg when this happens:
> 
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 0 err={0031 0039 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 1 err={0035 0039 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 1 err={0039 0040 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 1 err={0035 0040 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 0 err={0035 003d 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 0 err={0039 0031 0044 max=2}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 1 err={0035 0031 0026 max=3}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 1 err={0035 0039 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 0 err={0035 0035 0000 max=1}.
> [cu1216_set_parameters]:frequency = 290000000 , symbol = 6875000 , qam =
> 3, inversion = 0 err={0039 0039 0000 max=1}.
> 
> ..and so on. The messages stop coming when I stop trying to watch, but
> after I've gotten one of these I can never again get a lock on a
> channel. The only way of fixing this is rebooting the machine, since the
> modules can't be rmmod/modprobed (like many other people on this list,
> if I do that, upon modprobing it tells me it can't find a frontend).


This card VP-20330 needs a bridge reset after each tune, in addition to
some minor changes in the frontend (in another thread suggested by
Marko). To achieve this it needs a bit of further changes to the framework.


Manu





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