On 21 Nov 2010, at 13:07, Robert Longbottom wrote:

> 
> 
> On 21 Nov 2010, at 11:40 AM, Andre <linux-me...@dinkum.org.uk> wrote:
> 
>> 
>> On 20 Nov 2010, at 19:22, Oliver Endriss wrote:
>> 
>>> Hi,
>>> 
>>> On Saturday 20 November 2010 16:52:34 Robert Longbottom wrote:
>>>> Hi all,
>>>> 
>>>> I have a Satix-S2 Dual that I'm trying to get to work properly so that I 
>>>> can use it under MythTv however I'm running into a few issues.  I 
>>>> previously posted about the problems I'm having here to the mythtv 
>>>> list[1], but didn't really get anywhere.  I've had chance to have a bit 
>>>> more of a play and I now seem to have a definite repeatable problem.
>>>> 
>>>> The problem is when a recording stops on one of the inputs, after about 
>>>> 40s it causes the other input to loose it's signal lock and stop the 
>>>> recording as well.
>>>> 
>>>> 
>>>> Steps to demonstrate the problem (My Satix card is adapters 5 and 6)
>>>> 
>>>> In 3 seperate terminals set up femon/szap/cat to make a recording from 
>>>> one of the inputs:
>>>> 
>>>> 1 - femon -a 6 -f 0 -H
>>>> 2 - szap -a 6 -f 0 -d 0 -r -H -p -c scanResult07Oct2010_Satix -l 
>>>> UNIVERSAL "BBC 1 London"
>>>> 3 - cat /dev/dvb/adapter6/dvr0 > ad6.mpg
>>>> 
>>>> In 2 seperate terminals tune in the other input:
>>>> 
>>>> 4 - femon -a 5 -f 0 -H
>>>> 5 - szap -a 5 -f 0 -d 0 -r -H -p -c scanResult07Oct2010_Satix -l 
>>>> UNIVERSAL "ITV1 London"
>>>> 
>>>> Both inputs are fine, signal is good, recording from adapter 6 works.
>>>> 
>>>> 6 - Ctrl-C the szap process created in (5).
>>>> 
>>>> femon in (4) still reports status=SCVYL and decent signal strengh as if 
>>>> the adapter is still tuned and FE_HAS_LOCK.  After approximately 40 
>>>> seconds, either:
>>>> 
>>>> a) the signal drops significantly but the status remains at SCVYL and 
>>>> FE_HAS_LOCK
>>>> 
>>>> or
>>>> 
>>>> b) the signal drops and the status goes blank with no lock.
>>>> 
>>>> It doesn't seem to matter which of these two happen, but at the same 
>>>> time the recording on the other tuner looses it signal and stops 
>>>> recording, despite the fact that szap is still running in (2).  femon in 
>>>> (1) no longer reports FE_HAS_LOCK.
>>>> 
>>>> Strangely if I then try to restart the szap process created in terminal 
>>>> 2 (to try and retune it) it just waits after printing out "using 
>>>> '/dev/dvb/....".  However if I then restart the szap process in terminal 
>>>> 5, the one in terminal 2 suddenly kicks in and gets a lock.
>>>> 
>>>> Interestingly I found a link describing a 60s period the card is kept 
>>>> open for [2], which seems to be similar to my ~40s delay.  So it looks 
>>>> like when the second input on the card is closed the first input looses 
>>>> it's lock.
>>>> 
>>>> This obviously makes it pretty useless for MythTv and as a result it's 
>>>> not currently being used, which is a shame!
>>>> 
>>>> I'm using the ngene driver from the stock 2.6.35.4 kernel on Gentoo.
>>>> 
>>>> Does anyone else see this problem?  Is there anything I can do to try 
>>>> and fix / debug it?  Are there any bug fixes in the latest kernel that 
>>>> might help, or in the linux-dvb drivers that would help?
>>>> 
>>>> Any help or advice much appreciated.
>>> 
>>> Please try this driver:
>>> http://linuxtv.org/hg/~endriss/ngene-test2
>> 
>> Well that's progress, trying Robert's procedure fails with my stock driver 
>> (Ubuntu 10.10's 2.6.35-22-generic) but recording continues with your 
>> ngene-test2 driver :-)
>> 
>> NB I needed to go grab ngene_18.fw before it would work and I have three 
>> unexpected extra frontends, adapter 0,1&2 as well as the configured 5&6, not 
>> sure what's going on there yet!
>> 
>> There's a ber bump on the other tuner when you retune but it carries on 
>> which is the main thing at this stage. Can see glitches at the corresponding 
>> spot in the recording but worth a try with Myth perhaps?
>> 
>> I've been running with only one of the tuners for months, perhaps best to 
>> switch off active eit collection though looking at that ber bump.
>> 
>> Great stuff Oliver.
>> 
>> Andre
>> 
>> 
> 
> That does sound like good news, I'll try and give it a go later today now 
> that I have a process to test with. If it does appear to have fixed it then 
> I'll switch myth over to using it later next week and see how it gets on. 

I tried it with Myth 0.24 and just got six simultaneous HD recordings out of it 
:-)) total seven if you count the one I started to keep the HD-S2 card busy, 
can't try any more with that sat and my sub.

No glitches I can see, tried it a couple of times with different muxes, so far 
so good.
> 
> Will report back with the results later. 

You can have your thread back now ;-)

Andre


> 
> Robert. 
> 
>> 
>>> 
>>> CU
>>> Oliver
>>> 
>>> -- 
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>> 
> 

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