[linux-dvb] lifeview pci trio (saa7134) not working through diseqc anymore

Jordi Moles jordi.moles at gmail.com
Sat Dec 13 15:57:24 CET 2008


En/na hermann pitton ha escrit:
> Hi,
>
> just to avoid some new myth :)
>
> Am Freitag, den 12.12.2008, 14:22 +0100 schrieb Jordi Moles Blanco:
>   
>> wow, how many questions in just one mail, hahaha. i'll try to answer 
>> everything as well as i can.
>>
>>
>> En/na BOUWSMA Barry ha escrit:
>>     
>>> On Fri, 12 Dec 2008, Jordi Molse wrote:
>>>
>>>   
>>>       
>>>> However, i haven't been able to get diseqc working and i don't think i
>>>> will....
>>>>     
>>>>         
>>> It is too early to give up now!!1!  At least, I shall not
>>> give up until the sun melts away enough of the snow, so that
>>> I can go out and get more beer, though the melted snow
>>> will probably freeze into slick ice, and I'll probably
>>> end up hurting more than last time, this time with broken
>>> glass embedded into my body...  A direct infusion of that
>>> evil alcohol into by bloodstream without the middleman of
>>> passing the lips, gums, tongue, nose -- heck, why bother
>>> searching to find excellent-tasting beer when I won't notice
>>> and appreciate the difference anyway...
>>>
>>>   
>>>       
>> hahaha, and they say I'M crazy.
>>
>>
>>     
>>>   
>>>       
>>>> i used to have this card running in a dual boot with windows xp, where
>>>> everything worked like a charm, and another one where i kept installing linux
>>>> distros without any luck until "kubuntu hardy" came out. At that point, as the
>>>> card with diseqc worked "out of the box", i decided to erase all data and move
>>>>     
>>>>         
>>> One card, worked in two boxes; the first box a 'doze box,
>>> the second box Kubuntu Hardy...  (unsupported before then)
>>>
>>>
>>>   
>>>       
>> i just realised it couldn't be worse explained... hahaha. The thing 
>> is... i used to have one computer with the lifeview card. In this 
>> computer i had dual boot. In the first partition always windows, where 
>> the card would work through diseqc. On the second partition i would keep 
>> installing different linux distros until i found that "kubuntu hardy" 
>> worked.
>> After that i erased all data and installed only kubuntu hardy on my 
>> computer.
>>
>>     
>>>> then i upgraded the system and also moved the tower from its place to next to
>>>> the tv (to be a medicenter computer :) ). Then i couldn't view the channels
>>>> anymore. I tried to retune with no luck... I check all the cables, just in
>>>> case one of them was in bad shape. I even replaced the T connectors, just in
>>>>     
>>>>         
>>> System `upgraded' and stopped DiSEqC working; but also,
>>> system moved.  No success since then.
>>>
>>> Question:
>>>
>>> When you moved the system, did you have to add new cable?
>>> If so, how long was the length of cable from your machine
>>> to the DiSEqC switch before you moved it, and how long is
>>> this cable now, or is it the same length and same cable?
>>>
>>> Other question, what do you mean by a `T connector'?
>>> For satellite, I am familiar with the `F' connector, and
>>> I am also familiar with other types of `T' connector,
>>> but they should have no place in a satellite system...
>>>
>>>
>>>
>>>   
>>>       
>> So... after installing everything and getting it to work properly 
>> through diseqc, i upgraded the whole system to the latest packages and 
>> also moved the tower from my room to the another room. I didn't try to 
>> view any channel after upgrading and before moving the computer, and 
>> that's why i didn't know if the upgrade had broken the system or i had 
>> broken the card by moving the tower from room to room... or may be had i 
>> used bad cables in the new place?
>>
>> Then i turned on the tv and realised it was not working anymore. Then i 
>> went crazy and tried every possible thing until i came here to post for 
>> the first time.
>>
>>     
>>>> so... is it possible that somehow i've broken the card someone? the truth is
>>>>     
>>>>         
>>> Not too likely -- DiSEqC switching is basically the same
>>> as a modulated version of the 22kHz tone which is used to
>>> switch between low (below 11700) and high (above 11700)
>>> frequencies by the LNB.
>>>
>>> However, I have had experience with several different
>>> 2/1 and 4/1 DiSEqC switches at the end of long cable
>>> runs, which could not be properly switched by some DVB-S
>>> cards, but could -- or could not be switched by a consumer
>>> satellite receiver, but which worked flawlessly when located
>>> a few metres from the receiver, instead of nearly 100m away.
>>> The cable length attenuated or otherwise corrupted the
>>> DiSEqC bursts from some devices so that they failed to work.
>>>
>>>
>>>   
>>>       
>> I don't think distance is the problem, as now there are less meters from 
>> the dishes to my box.
>> Actually, it's the same 2 cables than before. I used to have 2 long 
>> cables which went from the dishes to a room (going through the room the 
>> computer is now). It used to be like 8-9 meters long.
>> Right now, the box is in this other room, closer to the dishes. I'm 
>> still using the same cables, but shorter, i cut 2-3 meters from each one 
>> as i don't need those meters anymore.
>> Obviuosly, i had to set the "F connectors again" (not T connectors, 
>> hehe) and... did i do it the right way? I don't know. I would think 
>> so... but that's why i asked you if there's a chance i've broken the 
>> card but mounting the F connectors the wrong way and causing the 
>> receiver to malfunction.
>>
>>     
>>>> that what used to work in windows... doesn't work anymore... this evening i
>>>> went back to windows just to check if the card, the diseqc and everything was
>>>> fine... and i had so many problems to get the satellite working as before. i
>>>> used to use progdvb, which supported diseqc for my card and now it just can't
>>>> tune through diseqc, none of the two satellites. other software does know how
>>>> to get through diseqc, but only switch 1.
>>>>     
>>>>         
>>> So, the same setup, apart from being moved, now no longer
>>> works the same as it used to work with 'doze, and 'doze
>>> either no longer works at all, or fails to switch DiSEqC?
>>>
>>> Note that a typical DiSEqC switch will simply pass along
>>> its 1/2 or 1/4 or 1/8 or 1/whatever input, when it does
>>> not receive the switching signal to select 2/2 or whatever.
>>>
>>>
>>>
>>>   
>>>       
>> Again, that was made me thing that i had broken something in my card or 
>> my diseqc switch, as i can tune from both separately but not together 
>> through diseqc.
>> It doesn't make much sense to me that the card is half-broken.... i 
>> mean... i can tune any satellite but not through diseqc.... but i asked 
>> because i'm no a hardware expert at all.
>>
>>     
>>>> i've checked cables and i don't think it's an issue from the diseq thing,
>>>> cause i've got two and both give the same problem.
>>>>     
>>>>         
>>> Two?  Two what -- DiSEqC switches, two cables to switches?
>>>
>>> Do you have a normal consumer satellite receiver, as well
>>> as your different computer boxes?
>>>   
>>>       
>> two diseqc switch to play with. lifeview is not working with any of them.
>>
>> i've got an engel tdt 5300 receiver, but diseqc never worked there.  I 
>> bought it when i had only one dish. When then i set the second one, i 
>> also fought to get diseqc working and i ended up trying the lifeview in 
>> my computer, which worked in windows. I though that it might  be a 
>> problem with engel's tunner, so i just let it go.
>>
>> i haven't tried now to make it work in the engel receiver... but if back 
>> then didn't use to work....
>>
>>     
>>> I'm going to guess based on where I think you are located,
>>> that you have something like the following -- please correct
>>> me where I ass-u-me wrong, and add any additional info that
>>> is missing from this...
>>>
>>> Dish+LNB pointed at 28E, large enough to receive BBC/ITV/etc
>>> Dish+LNB pointed at 19E (or offset mounted on 28E dish)
>>> DiSEqC switch(es) located near dishes -- or near your tuner
>>> so you can connect directly from each LNB as a test?
>>> Single cable run from switch to computer, or two cable runs
>>> from two switches?
>>>
>>> LNB19E--
>>>         \               long cable run
>>>          2/1 DiSEqC----------------------------Computer
>>>         /
>>> LNB28E--
>>>   
>>>       
>> i've got 2 80cm satellite dishes, one for Astra 28.2E and the other one 
>> for Astra 19.2E.
>> Then, from each dish i've got like 2-3 meters cable to where the 
>> computer is.
>> Then, next to the computer "the two become one", hehe, through the 
>> diseqc switch.
>>
>>  From diseqc i've got a cable, like 30cm long to the computer
>>
>> The diseqc switch is 2.0, like this one:
>>
>> http://www.sadoun.com/Sat/Products/DiSEqC/DS21-DISEQC-SWITCH.jpg
>>
>>     
>>> You also mention DVB-T/radio from this card; if you could
>>> mention how that affects the above, if at all (it should
>>> not, but I never know for sure)
>>>   
>>>       
>> I don't think it affects in any way. The card has 3 different chips, or 
>> so i think: one for radio, one for digital tv (terrestrial) and one for 
>> satellite tv. In windows you install 3 different drivers. Actually, 
>> windows see the card as 3 different cards, and you can "tune" the three 
>> chips at the same time. for example, you can view satellite while 
>> recording digital tv, which is great :)
>>     
>
> The latter is not true, you can`t view/record DVB-S and DVB-T at once.
> That would need a second saa7131 PCI bridge you don't have.
>
> It is one tda8275a hybrid tuner, which in this case is only used for
> radio and analog TV, a second tda8275a hybrid tuner, which is only used
> for DVB-T on this card with tda10046 channel decoder and a single
> tda826x tuner for DVB-S with tda10086 channel decoder and isl6421 ...
>   

sorry about that, as i said, I'm not a hardware expert, ii just though 
this worked like that but I never used it this way, so...


>   
>> In Linux this doesn't happen. Linux sees the card "as one", and you have 
>> to keep  doing
>>
>> modprobe saa7134 use_frontend=0... =1..=2 to get one chip or another to 
>> work.  Although it would be great to have all of them working at the 
>> same time.. it's not a problem for me, as i actually never used this 
>> feature in windows.
>>
>>     
>>> Also, if you have any spares (a pile of DiSEqC switches,
>>> other DVB-S capable cards, etc), it would be handy for me
>>> to know -- in the case of my 4/1 switches located more
>>> than 50m from my tuners, it was partially a case of
>>> swapping in other switches from my pile of them until
>>> finding a working combination, or running an additional
>>> several hundred metres of cable to permit me to switch
>>> the four positions close to the tuners...
>>>
>>>
>>>   
>>>       
>> i don't think there's any other helpful information to provide.
>>
>>     
>
> We need to go through the code in question, investigate Ubuntu
> downports, reread datasheets as far as available (!) and my first guess
> is your switch worked once with diseqc enabled on the tda10086, at least
> for low. On high with permanent tone from the isl6121 also enabled, I
> doubt it ever came through.
>
> Cheers,
> Hermann
>
>
>
>   

i don't know, this is too technical to me :'(
what I do know is that only for once, i got diseqc 2.0 with astra 19E 
and 28E working in kaffeine.  Ever since that  moment I've tried to 
reproduce  the scenario, but  i haven't got anymore, unfortunately.

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>   

I've contacted several ubuntu forums about the issue with the kernel, 
but nobody seems to know how to fix it. I will keep getting this message

****************
26.382391] saa7134: Unknown symbol videobuf_qbuf
[ 26.382468] saa7134: disagrees about version of symbol video_device_alloc
****************

again and again....

i've search in this very list and found some users who have had the same 
problem, but i haven't found anyone who got it working.
So... if anyone got it working, i would be very pleased to know, as 
right now ubuntu is for me the best option.

Thanks.



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