[mythtv] CAM reset needed

[Jochen Kühner]

Rudy Zijlstra schrieb:
> Wim Fokkens wrote:
>
>   
>>>> Hi,
>>>>
>>>> I'm finding that after using the CAM in a recording for about 1 hour or
>>>> more, i appear to need to reset the CAM. I've seen some strange
>>>> behaviour in tha past days and started testing yesterday and today. Each
>>>> time the what i see is that after watching an encrypted channel for a
>>>> while (seems to be >1hour), changing to another channel results in no
>>>> decryption (status LMSc in stead of LMSC). Each time this happens, if i
>>>> restart the backend the problem is solved and decryption works again.
>>>>
>>>> Would it be an idea to reset the CAM after each recording / before each
>>>> tune?
>>>>
>>>> Cheers,
>>>>
>>>> Rudy
>>>>      
>>>>
>>>>         
>>> I still have similar problems, although it has improved recently
>>> (running 12465), I sometimes have to restart the backend to get cam
>>> working, while its not the best solution the option to completely
>>> reset the cam on channel change would be a huge improvement!
>>>
>>> I tried to make a patch to do it but I didnt get very far :(
>>>
>>> Andy
>>>    
>>>
>>>       
>> I think it would be smarter to program some kind of watchdog for the CAM.
>> Witch resets the cam when the cam is not responding properly instead on each
>> channel change (the last option would make channel changes unnecessary slow)
>>
>> Wim
>>
>>  
>>
>>     
> So far, i've only seen it misbehave on channel change. I've not seen it 
> fail once decryption is ongoing. I would prefer a slower channel change 
> on encrypted DVB channels above failing tunes. I also prefer predictable 
> timings above non-predictable. On the other hand, many of the 
> unexpectatly slow changes would not be visible (would not be in live-TV. 
> As far as i currently know, it only fails on channel change (start of 
> encryption), so it would not matter so much.
>
> On the other hand, how to detect malbehaviour? In other words, how to 
> detect the difference between "i need a reset" and "you have no rights 
> for this". It seems the CAM can give messages to the last effect, i 
> simply do not know enough about it. One thing i do  not know for 
> example, is to which level the different CAM's are standardised in their 
> error messages. I do know that not all CAM's work in all STB's, which 
> seems to point to the fact they are not all the same in behaviour.
>
> It is those uncertainties, and the lack of documentation on CAM's, that 
> lead me to the first line approach of CAM reset at channel change.
>
> As i am no programmer though, I can discuss, yet not generate a patch. 
> Will happily test patches though.
>
> Cheers,
>
> Rudy
> _______________________________________________
> mythtv-dev mailing list
> mythtv-dev at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
>
>   

for a fast sollution a reset after each change may be easier to program, 
maybe??? it could be configurable if there should be a reset or not....